9–1.7 cm; outer coats enclosing 1 or more bulbs, brown to yellowbrown or gray, membranous, ± prominently cellular-reticulate, cells in ± regular vertical
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rhomboidal, 3.5–4 × 7–10 mm (striate), strigose. Seeds (1–) 2–6, light-brown to gray with black mottling, globose, 1.5 mm, smooth. Phenology: Flowering
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page 368. Mentioned on page 367, 369, 372. Plants 5–20 mm, in loose light green to gray-green mats, evenly foliate with distant, spreading leaves, the distal
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broad, 2–3 cm; areoles obdeltate, 4.5–8 × 2.5–5 mm; wool yellow-tan, aging gray. Spines 5–12 per areole, at most areoles, spreading, obscuring stems, yellow
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deciduous, with single trunks, sometimes with few to several trunks. Bark gray, scaly. Twigs reddish or yellowish, ca. 2 mm, densely or sparsely puberulent
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stems and inflorescences, hairs light-brown to yellowish white, dibrachiate. Young stems narrowly 2-winged; bark pale gray or nearly white, smooth or, ultimately
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subtribe Madiinae genusLayia speciesLayia chrysanthemoides (de Candolle) A. Gray Proc. Amer. Acad. Arts 7: 360. 1868. Bruce G. Baldwin, Susan J. Bainbridge
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Stems (flowering) 1–5, erect, light-brown, simple, strigillose or glabrate. Leaves basal (in rosettes) and cauline, gray-green; blades oval, 2–10 (–12)
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sometimes red tinged, concave at summit; ligules as long as wide; blades pale to gray-green, flat, 5–15 cm × 1.5–2.5 mm, shorter than culms, thin. Inflorescences
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spreading-ascending, poorly self-pruning; twigs slender, orange-red to redbrown, aging gray-brown, rough. Buds ovoid, redbrown, 0.5–1cm, resinous; scale margins nearly
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Association Shrubs, rarely trees, evergreen, to 2-3 m. Bark gray, scaly or furrowed. Twigs light-brown, 1-2 mm diam., inconspicuously short stellate-pubescent
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page 472, 473, 478, 479. Trees, 100–140 dm. Stems to 30 cm diam.; bark dark gray with platelike scales; young branches reddish orange and glabrous, becoming
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ovoid to subglobose, 1.5–2.5 × 1–2 cm; outer coats enclosing single bulb, gray-brown, membranous, lacking cellular reticulation or cells arranged in only
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glabrate or persistently pubescent, rarely glabrous. Buds dark redbrown or gray, round-ovoid, 1-1.5 mm, apex obtuse, sparsely pubescent or glabrate. Leaves:
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10-15 mm wide, including 1/3-1/2 nut, scales closely appressed, gray, tomentulose; nut light-brown, ovoid to barrel-shaped, 15-20 × 9-13 mm, apex rounded
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sparsely glandular. Florets 5–8. Cypselae 2.6–3.2 mm; pappi of 5–13 white to light tan bristles (widened bases persistent, bases connate in groups of 2–4, if
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narrow). Stems white (becoming dark gray with age), canescent (bark exfoliating). Leaves persistent, light or dark gray-green; blades long-cuneate to lanceolate
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Eriogonum cernuum subsp. tenue (Torrey & A. Gray) S. Stokes Eriogonum cernuum var. tenue Torrey & A. Gray Eriogonum cernuum var. umbraticum Eastwood Eriogonum
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scales closely appressed, ovate, markedly tuberculate, proximally gray-tomentulose; nut light-brown, ovoid to ellipsoid, (8-) 12-15 (-33) × 7-12 (-18) mm. Cotyledons
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1753 Synonyms: Aster asperifolius E. S. Burgess Aster baldwinii Torrey & A. Gray Aster claviger E. S. Burgess Aster corrigiatus E. S. Burgess Aster gracilescens E
15 KB (1,040 words) - 21:04, 29 July 2020
vagans var. breweri (A. Gray) Jepson A. vexillocalyculatum subsp. breweri (A. Gray) D. M. Thompson Sairocarpus breweri (A. Gray) D. A. Sutton Treatment
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megalocarpa A. Gray Ann. Lyceum Nat. Hist. New York 3: 208. 1835. Robert Kral IllustratedEndemic Synonyms: Phaeocephalum dodecandrum (Baldwin ex A. Gray) House
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(Engelmann & A. Gray) W. L. Wagner & Hoch Syst. Bot. Monogr. 83: 213. 2007. Warren L. Wagner Basionym: Gaura lindheimeri Engelmann & A. Gray Boston J. Nat
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palmeri A. Gray Proc. Amer. Acad. Arts 11: 79. 1876. Leila M. Shultz Common names: Palmer sagewort Synonyms: Artemisiastrum palmeri (A. Gray) Rydberg Treatment
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1m diam., straight to contorted; crown broad, thin, irregular. Bark dark gray-brown to near black, deeply furrowed, with long, scaly, irregularly anastomosing
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ascending or prostrate, gray, simple or branched (slender, wandlike, soft, bases woody and brittle), densely canescent. Leaves cauline, gray-green; blades linear-oblong
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speciesGutierrezia arizonica (A. Gray) M. A. Lane Sida 8: 313. 1980. Guy L. Nesom Common names: Arizona snakeweed Basionym: Greenella arizonica A. Gray Proc. Amer. Acad
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Calamagrostis porteri subsp. insperata, Calamagrostis porteri subsp. porteri A. Gray Kendrick L. Marr, Richard J. Hebda, Craig W. Greenef Common names: Porter's
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old light, grayish, or deep reddish-brown, at end of 1d year often deep redbrown, 2-years old gray or light-brown tinged with red, older ashy gray; thorns
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Common names: Light-yellow-flowered larkspur Conservation concernEndemic Basionym: Delphinium menziesii var. (ß) Nuttall in J. Torrey & A. Gray, Fl. N. Amer
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LAYOUT:treatment:TUOYAL familyPhrymaceae genusDiplacus speciesDiplacus torreyi (A. Gray) G. L. Nesom Phytoneuron 2012-39: 32. 2012. Guy L. Nesom, Melissa C. Tulig
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angelicus (I. M. Johnston) Moran, P. eximius D. D. Keck, P. rotundifolius A. Gray, P. spectabilis var. subinteger (D. D. Keck) C. C. Freeman, and P. vizcainensis
16 KB (905 words) - 19:18, 29 July 2020
appressed, occasionally diverging up to 30° from the rachises; spikelets light yellowish, occasionally with reddish-purple markings Eragrostis lutescens
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Treatment on page 341. Mentioned on page 340. Herbs, perennial, 4–11 dm; herbage light green to dark green, glabrate. Leaves: petiole length 1/3–1/2 blade; blade
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familyOrobanchaceae genusOrthocarpus speciesOrthocarpus pachystachyus A. Gray in A. Gray et al. Syn. Fl. N. Amer. 2(1): 300. 1878. Kerry A. Barringer Common
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relatively numerous, erect, gray, simple (annual flowering branches leafy), loosely sericeous. Leaves (semideciduous) cauline (sessile), gray-green; blades oblanceolate
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EndemicConservation concern Basionym: Helianthus parviflorus var. attenuatus A. Gray in A. Gray et al., Syn. Fl. N. Amer. 1(2): 278. 1884, Treatment appears in FNA
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torreyana A. Gray Ann. Lyceum Nat. Hist. New York 3: 197. 1835. Robert Kral IllustratedEndemic Synonyms: Phaeocephalum torreyanum (A. Gray) House Treatment
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tribeAsteraceae tribe Astereae genusErigeron speciesErigeron pinnatisectus (A. Gray) A. Nelson Bull. Torrey Bot. Club 26: 246. 1899. Guy L. Nesom Common names:
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redbrown, puberulous (rarely glabrous), slightly resinous, aging gray, smooth. Buds ovoid, light-redbrown, 0.9–1cm, resinous; lower scales ciliolate along margins
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twigs opposite to whorled, grayish, pubescence sparse, light-brown; fresh leaf-scars with light-brown periderm. Buds exposed, brown, globose, small, resinous
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Delphinium nuttallii subsp. nuttallii, Delphinium nuttallii subsp. ochroleucum A. Gray Bot. Gaz. 12: 54. 1887. Michael J. Warnock Endemic Treatment appears in FNA
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faces usually tomentose, tomentulose, or covered with dense wool (thinly gray-tomentose in Leibnitzia) > 4 2 Leaf blades narrowly linear-lanceolate (spiny
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mottled gray, orange, or tan, mostly straight, graceful, ± smooth; bark shed in large, irregular patches. Leaves: petiole 0.1–0.2 cm; blade light green abaxially
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cespitose, to 2 (-4) dm. Leaves to 20 cm; petiole to 2/3 length of leaf; blade gray-green abaxially, green adaxially, lanceolate, deeply 1-2×-lobed with 3-4
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Treatment on page 370. Trees to 30m; trunk to 2m diam.; crown conic. Bark gray-brown, scaly. Branches short and stout, the upper ascending, the lower drooping;
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FNA Volume 12. Treatment on page 56. Young branches gray. Leaves clustered on short-shoots; blade light green abaxially, dull green adaxially, narrowly elliptic
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Volume 12. Treatment on page 56. Young branches red to gray. Leaves scattered along branchlets; blade light green abaxially, green adaxially, narrowly elliptic
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1 Herbage dull gray; petioles not or barely winged; leaf blades ovate to suborbiculate Enceliopsis
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faces glabrous or sparsely hairy; phyllary margins light green. Artemisia rupestris 4 Leaves gray-green, faces canescent to villous; phyllary margins
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spreading, linear to narrowly elliptic, white at anthesis, darkening with age to light to medium deep pink, with inverted V-shaped, white base; bracts horizontal
30 KB (822 words) - 06:13, 30 July 2020
‘hedged’ appearance; bark dark gray, exfoliating with age). Leaves persistent, usually bright green to dark green, sometimes gray-green; blades cuneate, 3-lobed
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genusPotamogeton speciesPotamogeton oakesianus J. W. Robbins in A. Gray in A. Gray,Manual of Botany of the Northern United States (ed. 5) 485. 1867. Robert
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slender, pale redbrown, puberulous or glabrous, sometimes glaucous, aging gray or gray-brown, smooth. Buds ellipsoid, redbrown, ca. 1cm, resinous. Leaves 5
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Basionym: Anychia baldwinii Torrey & A. Gray Fl. N. Amer. 1: 172. 1838 Synonyms: Anychiasatrum baldwinii (Torrey & A. Gray) Small Anychiasatrum riparium (Chapman)
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Vesicaria recurvata Engelmann ex A. Gray Boston J. Nat. Hist. 6: 147. 1850 Synonyms: Lesquerella recurvata (Engelmann ex A. Gray) S. Watson Treatment appears
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Cardueae genusCirsium speciesCirsium pitcheri (Torrey ex Eaton) Torrey & A. Gray Fl. N. Amer. 2: 456. 1843. David J. Keil Common names: Dune or sand-dune
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racemosum Torrey & A. Gray Fl. N. Amer. 1: 514. 1840. Harlan Lewis†, Warren L. Wagner Synonyms: Gayophytum caesium Torrey & A. Gray G. helleri Rydberg G
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Synonyms: Dodecatheon latilobum (A. Gray) Elmer ex R. Knuth Dodecatheon meadia var. latilobum A. Gray Primula latiloba (A. Gray) Mast & Reveal Treatment appears
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pubescent but usually pilose proximally, infrequently glabrous. Achenes light to dark-brown, not winged (but nearly so in E. saxatile), 3-gonous, glabrous
80 KB (1,352 words) - 10:29, 30 July 2020
Rosa gymnocarpa var. serpentina Nuttall in J. Torrey and A. Gray in J. Torrey and A. Gray, Fl. N. Amer. 1: 461. 1840. Walter H. Lewis, Barbara Ertter,
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throats 9–12 mm, lobes 5.5–9 mm; style tips 6 mm. Cypselae light-brown, 6 mm, collars also light-brown, ca. 0.75 mm; pappi 25–33 mm. Phenology: Flowering
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pinnate. Flowers: petals light to golden yellow, (11.4–) 13.8–24.4 (–26.9) × 4–7.5 mm, apex rounded, glabrous abaxially; stamens light to golden yellow, 5 outermost
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rosettes. Stems erect, terete, 18–100 (–160) cm, well branched distally, densely gray-villous proximally, mixed villous and glandular puberulent distally, often
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tribe Cynodonteae genusSporobolus speciesSporobolus cryptandrus (Torr.) A. Gray Paul M. Peterson, Stephan L. Hatch, Alan S. Weakley Common names: Sand dropseed Sporobole
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4 × 1.3–1.7 mm, glabrous; columella (0.9–) 1–1.2 mm. Seeds white to gray or light pink, ovoid, bluntly 3–4-angled in cross-section, 0.7–1.1 × 0.4–0.7 mm
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Fl. Ludov., 67. 1817 (as pratense) Synonyms: Aster phyllolepis Torrey & A. Gray Aster sericeus var. microphyllus de Candolle Symphyotrichum sericeum var
12 KB (723 words) - 21:02, 29 July 2020
Candolle Ludwigia angustifolia Michaux L. linearis var. puberula Engelmann & A. Gray Treatment appears in FNA Volume 10. Herbs slender, usually with aerenchyma
12 KB (886 words) - 21:01, 7 June 2022
below the nodes, rarely with a glandular ring, glands usually dull, greenish-gray to stramineous; primary branches 0.5-6 cm, diverging 20-100° from the rachises;
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familyOrobanchaceae genusCastilleja speciesCastilleja mexicana (Hemsley) A. Gray Proc. Amer. Acad. Arts 21: 404. 1886. J. Mark Egger, Peter F. Zika, Barbara
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usually concentrated on keels); columella 1.9–2.5 mm. Seeds white to gray or light-brown, ovoid, bluntly 4-angled in cross-section, 1.9–2.5 × 1.4–1.7 mm
11 KB (696 words) - 18:21, 29 July 2020
rose-purple, (6–) 10–15 × 4.5–6 mm, apical notch 2.6–3 mm; filaments cream or light pink, those of longer stamens 6–8 mm, those of shorter ones 3.5–4.5 mm; anthers
12 KB (1,024 words) - 21:02, 7 June 2022
genusPersicaria sectionPersicaria sect. Persicaria speciesPersicaria maculosa Gray Nat. Arr. Brit. Pl. 2: 269. 1822. Harold R. Hinds†, Craig C. Freeman Common
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ascending; berries red. Ribes erythrocarpum 15 Inflorescences pendent; berries gray-black. Ribes acerifolium 16 Anther apices (apex of connective) with cup-shaped
23 KB (1,464 words) - 13:16, 30 July 2020
(A. Gray) Greene Erythea 3: 39. 1895 ,. James L. Reveal Common names: Alpine shootingstar Endemic Basionym: Dodecatheon meadia var. alpinum A. Gray in W
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prominent, subcircular, 4.5–5.5 mm, greatly enlarging to 10 mm diam.; wool tan to gray. Spines 5–13 per areole, in most areoles, usually reflexed, translucent yellow
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hispidus A. Gray Proc. Calif. Acad. Sci. 3: 101. 1864. Ihsan A. Al-Shehbaz EndemicConservation concern Synonyms: Euklisia hispida (A. Gray) Greene Treatment
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Potentilleae genusIvesia sectionIvesia sect. Ivesia speciesIvesia pygmaea A. Gray Proc. Amer. Acad. Arts 6: 531. 1865. Barbara Ertter, James L. Reveal Common
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Penstemon sectionPenstemon sect. Cristati speciesPenstemon miser A. Gray in A. Gray et al. Syn. Fl. N. Amer. ed. 2, 2(1): 441. 1886. Craig C. Freeman Common
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subgenusEriogonum subg. Oligogonum speciesEriogonum allenii S. Watson in A. Gray et al. in A. Gray et al., Manual ed. 6, 734. 1890. James L. Reveal Common names: Shale
8 KB (885 words) - 10:45, 30 July 2020
genusIvesia sectionIvesia sect. Unguiculatae speciesIvesia unguiculata A. Gray Proc. Amer. Acad. Arts 7: 339. 1868. Barbara Ertter, James L. Reveal Common
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Potentilleae genusIvesia sectionIvesia sect. Ivesia speciesIvesia webberi A. Gray Proc. Amer. Acad. Arts 10: 71. 1874. Barbara Ertter, James L. Reveal Common
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Stems 1–several, spreading to erect, bushlike or forming low rounded mounds, gray-tomentose with appressed feltlike trichomes; branches 0–several, inclined
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persisting (2–) 4–6 (–7) years, 12–22 (–25) cm × ca. 1.5–2mm, slightly twisted, gray to yellow-green, all surfaces with fine stomatal lines, margins finely serrulate
8 KB (619 words) - 00:34, 30 July 2020
(Engelmann ex A. Gray) W. L. Wagner & Hoch Syst. Bot. Monogr. 83: 214. 2007. Warren L. Wagner Basionym: Gaura suffulta Engelmann ex A. Gray Boston J. Nat
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tribeAsteraceae tribe Cardueae genusCirsium speciesCirsium lecontei Torrey & A. Gray Fl. N. Amer. 2: 458. 1843. David J. Keil Common names: Black or Le Conte’s
9 KB (770 words) - 20:29, 29 July 2020
L familyOrobanchaceae genusCastilleja speciesCastilleja lasiorhyncha (A. Gray) T. I. Chuang & Heckard Syst. Bot. 16: 657. 1991. J. Mark Egger, Peter F
8 KB (638 words) - 18:53, 29 July 2020
Little-cup beardtongue Endemic Basionym: Penstemon azureus var. ambiguus A. Gray in A. Gray et al. Syn. Fl. N. Amer. 2(1): 272. 1878 Treatment appears in FNA Volume
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418. Mentioned on page 414. Herbs, erect, 1–8 dm, tomentose, greenish gray to gray. Stems: aerial flowering-stems erect, 0.5–1 (–1.5) dm, tomentose. Leaves
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basal: 1–5; petiole 4.5–14.5 cm, puberulent; blade gray-green to purple-tinted abaxially, green or gray-green adaxially, ovate, ± orbiculate, or ± deltate
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Culms erect, terete, 1–3 mm diam., smooth. Cataphylls 0 or 1–2., pink to gray, apex acute. Leaves: basal 1, cauline 2–4, green to pink; auricles 0.5–1
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scaly plates. Branches straight to ascending; twigs stout (1–2cm thick), pale gray-brown, aging darker brown, rough. Buds ovoid-conic, to 2cm, resinous; scale
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Treatment on page 369. Trees to 7 (–12) m. Bark white, often with irregular gray or light-brown patches, smooth. Buds glabrous, resinous. Leaves: petiole 0.3–1
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on page 332. Mentioned on page 328. Shrubs, 3–10 dm. Stems much-branched, gray-tomentose. Leaves: stipular lines faint; petiole 0 mm; blade grayish, linear
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flowering to 40 cm. Stems short. Leaves 15–30, many-ranked, erect to spreading, gray, 20–40 × 0.1–0.4 cm, densely appressed-grayish-scaly; sheath chestnut-brown
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subsp. tomentosus (Kjellman) Hultén Senecio atropurpureus var. dentatus A. Gray ex Hultén Senecio frigidus var. tomentosus (Kjellman) Cufodontis Tephroseris
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6m diam.; crown spirelike, with age becoming flat-topped, cylindric. Bark gray, thin, smooth, with age breaking into scaly plates. Branches diverging from
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Heliantheae) subtribe Helianthinae genusHelianthus speciesHelianthus cusickii A. Gray Proc. Amer. Acad. Arts 21: 413. 1886. Edward E. Schilling Common names: Cusick’s
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concolor, gray-green, thinly woolly. Heads (usually 1–7) in subcapitate to loose, spiciform arrays. Involucres campanulate, 5–6 mm. Phyllaries light green
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Candolle Prodr. 10: 592. 1846 Synonyms: A. coulterianum subsp. orcuttianum (A. Gray) Pennell Treatment appears in FNA Volume 17. Treatment on page 45. Mentioned
6 KB (497 words) - 19:02, 29 July 2020
Club 10: 87. 1883 Synonyms: Senecio fastigiatus var. layneae (Greene) A. Gray Treatment appears in FNA Volume 20. Treatment on page 590. Mentioned on page
6 KB (558 words) - 21:18, 29 July 2020
7: 413. 1841 Synonyms: Senecio aureus var. lanceolatus Oakes ex Torey & A. Gray Senecio robbinsii Oakes ex Rusby Treatment appears in FNA Volume 20. Treatment
6 KB (582 words) - 21:19, 29 July 2020
slender, pale orangebrown, puberulent-glandular, aging brown to gray-brown. Buds ovoid, light-redbrown, ca. 0.4–0.5cm, slightly resinous. Leaves (3–) 4 (–5)
7 KB (490 words) - 00:26, 30 July 2020
Endemic Basionym: Najas indica var. gracillima A. Braun ex Engelmann in A. Gray, Manual ed. 5, 681. 1867 Treatment appears in FNA Volume 22. Stems slightly
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strigillose (hairs white, stiff), eglandular. Leaves mostly basal (persistent); (gray-green) blades narrowly oblanceolate to subspatulate, 9–62 × 1–5 mm, cauline
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subshrubs, (7–) 8–14 cm (cespitose), faintly aromatic. Stems 5–8, silver-gray, densely tomentose. Leaves persistent, silver-green, mostly basal; proximalmost
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familyAsteraceae tribeAsteraceae tribe Astereae genusErigeron speciesErigeron canus A. Gray Mem. Amer. Acad. Arts, n. s. 4: 67. 1849. Guy L. Nesom Common names: Hoary
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persistent leaf-bases. Leaves to 7 cm; petiole to 2/3 length of leaf; blade gray to blue-green on both surfaces, lanceolate, with 2-3 (-4) pairs of primary
6 KB (520 words) - 15:26, 15 December 2020
Wavyleaf or gray or pasture thistle Basionym: Carduus undulatus Nuttall Gen. N. Amer. Pl. 2: 130. 1818 Synonyms: Cirsium megacephalum (A. Gray) Cockerell
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gordonii (A. Gray) O’Kane & Al-Shehbaz Novon 12: 323. 2002. Steve L. O’Kane Jr. Common names: Gordon’s bladderpod Basionym: Vesicaria gordonii A. Gray Boston
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pubescent, 1-year old light-brown to olive-tan or mid brown, 2-years old dark gray or reddish-brown overlaid dark gray, older gray; thorns on twigs usually
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vestiture is short and dense, such that the leaf surfaces appear to be light green or gray and insufficient magnification is used to see the trichomes. Careful
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scattered, stubby, white, multicellular hairs. Staminate flowers: sepals 3, gray, cuneate-spatulate, 2 mm; apex shallowly 3-cleft, surfaces distally hairy
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cinerascens A. A. Eaton Fern Bull. 7: 33. 1899. Iván A. Valdespino Common names: Gray spike-moss Treatment appears in FNA Volume 2. Plants terrestrial, forming
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of North America Association Culms often curved, weak, 10–25 cm. Leaves ± gray-green, often channeled, rarely flat, 1–2 mm wide. Inflorescences 7–25 × 5–12
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Tryon, R. M. 1956. A revision of the American species of Notholaena. Contr. Gray Herb. 179: 1--106. Windham, M. D. 1986. Reassessment of the phylogenetic
13 KB (724 words) - 00:34, 30 July 2020
racemosa subsp. multiflora Cronquist Prenanthes racemosa var. pinnatifida A. Gray Treatment appears in FNA Volume 19. Treatment on page 269. Mentioned on page
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plumosa (Elliott) House Rhynchospora penniseta Grisebach Rhynchospora semiplumosa A. Gray Treatment appears in FNA Volume 23. Treatment on page 219. Mentioned on page
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dm. Stems 1-trunked; 1-year old twigs dark purple-brown, older dark, dull gray; thorns on twigs straight or slightly recurved, 1.5–3 cm, 3-years old dark
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basally, elongate, to 5 × 1–1.5 cm; outer coats enclosing 1 or more bulbs, gray or brown, reticulate, cells very coarse-meshed, open, fibrous; inner coats
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twigs: new growth green, densely appressed-pubescent, 1-year old purple brown-gray, slender; thorns on twigs numerous, ± straight, 2-years old purple-brown
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shiny, older gray-brown; thorns on twigs single, slightly recurved, usually brown young, 2 cm. Leaves: (fall color plum to crimson or light crimson); petiole
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2–2.5 × 0.8–1 mm, margins entire, apex acute, surfaces glabrous; corolla light pink to white, tubular, petals connate to 3/4 length, 5–7.5 × 1.8–2.2 mm
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in FNA Volume 2. Trees to 25m; trunk to 0.75m diam.; crown spirelike. Bark gray, thin, smooth, with age developing appressed reddish scales at trunk base
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Harlan Lewis†, Warren L. Wagner Synonyms: Gayophytumnuttallii torrey & A. Gray Treatment appears in FNA Volume 10. Herbs glabrous or sparsely and minutely
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medium length to long, stiff to soft, shorter stipitate-glandular ones. Leaves gray-green becoming ± purple to sometimes green as hairs lost, oblong to lanceolate-oblong
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to subglobose, 1.4–1.8 mm diam., pilose; columella 1.1–1.4 mm. Seeds gray to light-brown, ovoid, 4-angled in cross-section, 0.9–1.1 × 0.5–0.6 mm, rugose
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subtribe Helianthinae genusHelianthus speciesHelianthus schweinitzii Torrey & A. Gray Fl. N. Amer. 2: 330. 1842. Edward E. Schilling Common names: Schweinitz’s
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Eucycla speciesEriogonum villiflorum A. Gray Proc. Amer. Acad. Arts 8: 630. 1873. James L. Reveal Common names: Gray’s wild buckwheat Endemic Treatment appears
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1.5–2.2 × 1.8–2.2 mm, tomentose; columella 1.2–1.6 mm. Seeds white, gray, or light-brown, ovoid, sharply 4-angled in cross-section, abaxial faces slightly
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Volume 2. Trees to 60m; trunk to 1.9m diam.; crown somewhat spirelike. Bark gray, thin, smooth, with age thickening and breaking into deep longitudinal furrows
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vestigial, yellow. Glochids few, scattered, poorly developed, yellow, aging gray to blackish, to 1.5 mm, covered by white, cottony wool. Flowers: inner tepals
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2–3 rows distal to roots, ± quadrate, without fibers; inner coats white or light-brown, cells absent or obscure and ± quadrate. Leaves deciduous with scape
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genusEriogonum subgenusEriogonum subg. Oligogonum speciesEriogonum kelloggii A. Gray Proc. Amer. Acad. Arts 8: 293. 1870. James L. Reveal Common names: Red Mountain
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A. Levin Common names: Sand reverchonia Basionym: Reverchonia arenaria A. Gray Proc. Amer. Acad. Arts 16: 107. 1880 Treatment appears in FNA Volume 12.
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pygmaea (Douglas) P. H. Raven O. boothii var. pygmaea (Douglas) Torrey & A. Gray Sphaerostigma boothii var. pygmaeum (Douglas) Walpers Treatment appears in
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oblate, 1.5–1.7 × 1.8–2.2 mm, glabrous; columella 1.2–1.4 mm. Seeds gray to light-brown, ovoid, inconspicuously 4-angled in cross-section, 1.2–1.6 × 1–1
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mm; carpels (1–) 2–4, styles 1.5–2 mm. Achenes yellowish green to light tan or gray-brown, 1.7–1.9 mm. Phenology: Flowering summer. Habitat: Talus slopes
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familyCyperaceae genusRhynchospora speciesRhynchospora miliacea (Lamarck) A. Gray Ann. Lyceum Nat. Hist. New York 3: 198. 1835. Robert Kral Illustrated Basionym:
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Illustrated Basionym: Rhynchospora distans Elliott 1816 Rhynchospora elliottii A. Gray 1835 Synonyms: Phaeocephalum grayi (Kunth) House Schoenus distans Muhlenberg
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glabrate. Phyllaries in 5–8 series, strongly imbricate, (green, drying green or light-brown), ovate to lance-oblong, abaxial faces with or without poorly developed
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Penstemon sectionPenstemon sect. Saccanthera speciesPenstemon caesius A. Gray Proc. Amer. Acad. Arts 19: 92. 1883. Craig C. Freeman Common names: San Bernardino
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Spikelets 4-5.4 mm long, 1-1.5 mm wide, linear-lanceolate, plumbeous to greenish-gray, with 3-5 florets; disarticulation acropetal, paleas persistent. Glumes subequal
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present, 0.2-0.4 mm; upper lemmas about 1.2 mm, pale-brown or pale gray, becoming light-brown at maturity, acute; anthers 0.8-0.8 mm. 2n = 18. Generated
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LAYOUT:treatment:TUOYAL familyCyperaceae genusRhynchospora speciesRhynchospora oligantha A. Gray Ann. Lyceum Nat. Hist. New York 3: 212. 1835. Robert Kral Illustrated Treatment
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French’s shootingstar Basionym: Dodecatheon meadia var. frenchii Vasey in A. Gray et al., Manual ed. 6 issue 2, 735b. 1891 Synonyms: Dodecatheon meadia subsp
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genusEriogonum subgenusEriogonum subg. Oligogonum speciesEriogonum incanum Torrey & A. Gray Proc. Amer. Acad. Arts 8: 161. 1870. James L. Reveal Common names: Frosted
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Perennials, 50–200+ cm; taprooted. Stems 1–several, erect or ascending, thinly gray-tomentose or ± glabrate; branches few-to-many, ascending. Leaves: blades
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white, reddish-brown, gray, or yellowish, glabrous; radial spines (5–) 6–7 (–9) per areole, largest spines reddish-brown, gray, or yellowish, tips blackish
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redbrown, 2-years old dark reddish and gray; thorns on twigs ± straight, 1-year old glossy, very dark redbrown, older dark gray, shorter conic, stout, 1.5–2.5
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speciesEurybia ×herveyi (A. Gray) G. L. Nesom Phytologia 77: 262. 1995. Luc Brouillet Common names: Hervey’s aster Basionym: Aster herveyi A. Gray Manual ed. 5, 229
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monocarpic perennials, 20–100 cm; taproots long. Stems usually 1, erect, ± densely gray-tomentose with fine, non-septate trichomes; branches 0 or few, usually above
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subgenusEriogonum subg. Eucycla speciesEriogonum ericifolium Torrey & A. Gray Proc. Amer. Acad. Arts 8: 170. 1870. James L. Reveal Common names: Heather-leaf
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old purple-brown, older dark gray, usually slender; thorns on twigs usually numerous, ± straight, 2-years old blackish gray, fine, 1–4 cm. Leaves: petiole
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twigs: new growth light green, villous, at end of 1st year dull redbrown, sparsely villous or pubescent, strongly flexuous, 1-year old gray-brown, stout; thorns
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Philadelphia 7: 33, plate 3, fig. 1. 1834 Synonyms: Haplopappus acaulis (Nuttall) A. Gray Haplopappus acaulis var. atwoodii S. L. Welsh Haplopappus acaulis subsp.
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EndemicIllustrated Synonyms: Delphinium scopulorum var. glaucum (S. Watson) A. Gray Delphinium splendens G. N. Jones Treatment appears in FNA Volume 3. Illustrator:
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where the ranges of the varieties approach one another. Edaphic factors and light intensity also make identification more difficult by strongly influencing
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leaves; arctic species of Alaska and Canada > 3 2 Stems with green or gray to light maroon leaves (not densely covered with reddish or reddish brown, marcescent
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axillary fascicles. Some have incrustations of silica, which appear as smooth, gray or whitish, marbled patches or striations on leaves and stems. Siliceous
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page 37, 38, 92, 135, 139, 140. Plants small to medium to fairly robust, gray-green to bluish green to reddish-brown with age, in loose tufts, often forming
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Penstemon sectionPenstemon sect. Penstemon speciesPenstemon whippleanus A. Gray Proc. Amer. Acad. Arts 6: 73. 1862. Craig C. Freeman Common names: Whipple’s
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pith not mucilaginous; latex absent. Spines (33–) 43–60 per areole, white to gray, tan, or pale reddish (central spines with darker, usually chalky blue tips)
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purple, orange, yellow, or green; mature seed cones light green, dark blue, deep purple, or gray. Abies grandis 10 Adaxial surface at midleaf glaucous
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laminae (3–) 4–5 (–8) × 0.9–1.2 mm. Disc-florets 8–16 (–20); corollas cream to light yellow turning pink or reddish purple, (2.5–) 3–5 mm, tubes shorter than
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arizonicum (A. Gray) Anderberg Opera Bot. 104: 147. 1991. Guy L. Nesom Common names: Arizona rabbit-tobacco Basionym: Gnaphalium arizonicum A. Gray Proc. Amer
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and these species are then placed in subg. Therorhodion (Maximowicz) A. Gray (W. R. Philipson and M. N. Philipson 1986). Here, Therorhodion is recognized
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glassy yellow hairs; upper lemmas of all spikelets usually yellow or gray, sometimes light-brown, at maturity; anthers 0.5-0.6 mm. 2n = 54, 72. Generated Map
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genusEriogonum subgenusEriogonum subg. Eucycla speciesEriogonum kingii Torrey & A. Gray Proc. Amer. Acad. Arts 8: 165. 1870. James L. Reveal Common names: Ruby Mountains
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shallowly lobed, main spines slender, 2–5 (–10) mm, abaxial faces often thinly gray or white-tomentose with felted arachnoid trichomes, ± villous along major
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to lanceolate, entire to spiny-dentate, main spines 2–10 mm, abaxial faces gray-tomentose, villous with septate trichomes along veins, adaxial green, covered
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growth ± red, glabrous, 1-year old ± glossy, medium to deep brown, 2-years old gray; thorns on twigs numerous, straight to slightly curved, 1-year old deep brown
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1-year old shiny redbrown, 2-years old redbrown with white flakes, older gray; thorns on twigs usually numerous, ± straight to recurved, 2-years old shiny
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lobed toward base, acuminate, main spines slender, 1–5 mm, abaxial faces gray-tomentose, adaxial glabrous or sparsely villous with septate trichomes; basal
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genusMyriophyllum speciesMyriophyllum hippuroides Nuttall ex Torrey & A. Gray Fl. N. Amer. 1: 530. 1840. Robin W. Scribailo, Mitchell S. Alix Common names:
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tribeAsteraceae tribe Cardueae genusCirsium speciesCirsium drummondii Torrey & A. Gray Fl. N. Amer. 2: 459. 1843. David J. Keil Common names: Drummond’s or dwarf
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genusHorkelia sectionHorkelia sect. Horkelia speciesHorkelia tenuiloba (Torrey) A. Gray Proc. Amer. Acad. Arts 6: 529. 1865. Barbara Ertter, James L. Reveal Common
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subgenusEriogonum subg. Oregonium speciesEriogonum truncatum Torrey & A. Gray Proc. Amer. Acad. Arts 8: 173. 1870. James L. Reveal Common names: Mt. Diablo
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horizontal runner roots that produce root sprouts. Stems 1–several, erect, gray or white-tomentose; branches 0–few, ascending. Leaves: blades oblong-oblanceolate
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wintergreen pyrole à fleurs verdâtres Synonyms: Pyrola oxypetala Austin ex A. Gray Pyrola virens Schweigger Pyrola virens var. convoluta (W. P. C. Barton) Fernald
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genusEriogonum subgenusEriogonum subg. Oligogonum speciesEriogonum lobbii Torrey & A. Gray Proc. Amer. Acad. Arts 8: 162. 1870. James L. Reveal Common names: Lobb’s
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clones by layering. Stems erect, decumbent, or trailing; branches yellowbrown, gray-brown, or redbrown, (strongly glaucous or not, slightly glossy), glabrous;
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purplish red, 1.5–3 cm, usually gray-canescent; nectary disc raised 0.5–1 mm on ovary apex, 3–4 mm diam., glabrous; style light pink to rose-purple, 3.5–8 mm
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subgenusEriogonum subg. Eucycla speciesEriogonum lonchophyllum Torrey & A. Gray Proc. Amer. Acad. Arts 8: 173. 1870. James L. Reveal Endemic Synonyms: Eriogonum
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appressed-pubescent, 1-year old mid brown, 2-years old dark redbrown, older gray or dark gray; thorns on twigs usually numerous, straight to slightly curved, 1-year
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orange, or yellow), and about 1 mm in diameter. Fallen glands leave circular gray scars. Several species of Coryphantha closely resemble, and may be confused
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0.5–1 mm, anthers 0.6–1 mm; carpels 20–50 (–120); styles 2–4 mm. Achenes light to dark-brown, 1–1.5 mm, smooth or roughened. Phenology: Flowering summer
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unknown, but it is common in Populus, where it has been shown to increase light capture and carbon production (R. Ceulemans et al. 1990). Because syllepsis
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Wheeler, 142. 1879 Synonyms: Chrysopsis foliosa var. sericeovillosissima A. Gray Chrysopsis rutteri (Rothrock) Greene Treatment appears in FNA Volume 20.
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multistemmed resprouts to 5-10 m because of widespread destruction by blight. Bark gray, smooth when young, furrowed in age. Twigs glabrous. Leaves: petiole (8-)
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appears in FNA Volume 3. Trees, deciduous, single-trunked, to 30 m. Bark dark gray, furrowed. Pith homogeneous. Twigs and foliar buds silvery-pubescent. Leaves
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14: 18. 1856 Synonyms: Eriogonum microthecum var. foliosum (Torrey & A. Gray) Reveal Eriogonum microthecum var. macdougalii (Gandoger) S. Stokes Treatment
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Torrey Bot. Club 25: 617. 1898 Synonyms: G. biennis var. pitcheri Torrey & A. Gray G. filiformis var. kearneyi Munz G. longiflora Spach 1836 Treatment appears
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ultisols have yellow to gray colors that reflect poorer drainage conditions. The yellow results from hydration of iron whereas the gray colors occur under reducing
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Journal of the Society for Conservation Biology. Contr. Gray Herb. = Contributions from the Gray Herbarium of Harvard University. Contr. Paleontol. Carnegie
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Jr. 1979). Vein patterns may best be seen by holding the blade up to the light, unless the tissues are very thick. Venation in dried, pressed specimens
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West, however, American botanists cataloged and described them. Engelmann, Gray, and Torrey followed standards set by Europeans, producing monographs and
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