Eriogonum robustum

Greene

Bull. Calif. Acad. Sci. 1: 126. 1885.

Common names: Altered andesite wild buckwheat
EndemicConservation concern
Synonyms: Eriogonum lobbii var. robustum (Greene) M. E. Jones
Treatment appears in FNA Volume 5. Treatment on page 375. Mentioned on page 332, 334.

Herbs, erect, matted, 0.5–3 × 1–2 dm, tomentose to floccose. Stems: caudex absent; aerial flowering-stems erect or nearly so, stout, solid, not fistulose, usually arising directly from a taproot, 0.5–1.2 (–1.6) dm, tomentose to floccose. Leaves basal, in well-defined rosettes; petiole 1–4 (–5.5) cm, tomentose to floccose; blade ovate to obovate, 2.5–4 (–5) × 1.6–2.5 (–3.5) cm, densely white to grayish or reddish-tomentose abaxially, less so to floccose or glabrous and greenish adaxially, margins entire, plane. Inflorescences 2-umbellate, 5–10 × 5–10 cm; branches tomentose to floccose; bracts 3–5 at proximal node, leaflike, 1.5–2.5 (–3.5) × 0.3–0,8 (–1) cm, sometimes absent immediately below involucre. Involucres 1 per node, campanulate, 8–11 (–13) × 8–12 mm, thinly tomentose to lanate; teeth 6–10, usually lobelike, mostly reflexed, 2–6 mm. Flowers 7–9 mm, including 0.1–0.4 mm stipelike base; perianth creamy yellow to pale yellowish, glabrous; tepals monomorphic, oblong-obovate; stamens exserted, 7–9 mm; filaments pilose proximally. Achenes light-brown to brown, 6–8 mm, glabrous.


Phenology: Flowering Jun–Aug.
Habitat: Heavy clayey slopes, montane and subalpine conifer woodlands
Elevation: 1300-2000(-2500) m

Distribution

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Nev.

Discussion

Of conservation concern.

Eriogonum robustum is restricted primarily to altered andesite soils in west-central Nevada, essentially at the confluence of Carson City, Lyon, Storey, and Washoe counties. There, due to the unusual soil, the plants typically occur in areas without sagebrush but among conifer species usually found at higher elevations. The species is cultivated infrequently and is a food plant for the intermediate dotted-blue butterfly (Euphilotes intermedia).

Lower Taxa

None.

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... more about "Eriogonum robustum"
light-brown;brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Greene +
deciduous +  and persistent +
stipelike +
0.01 cm0.1 mm <br />1.0e-4 m <br /> - 0.04 cm0.4 mm <br />4.0e-4 m <br /> +
awn-tipped +  and simple +
4 cm40 mm <br />0.04 m <br /> - 5 cm50 mm <br />0.05 m <br /> +
2.5 cm25 mm <br />0.025 m <br /> - 3.5 cm35 mm <br />0.035 m <br /> +
greenish +, densely white +  and grayish +
2.5 cm25 mm <br />0.025 m <br /> - 4 cm40 mm <br />0.04 m <br /> +
glabrous +, floccose +  and reddish-tomentose +
ovate;obovate +
1.6 cm16 mm <br />0.016 m <br /> - 2.5 cm25 mm <br />0.025 m <br /> +
not awn-tipped +
8 cm80 mm <br />0.08 m <br /> - 1 cm10 mm <br />0.01 m <br /> +
glandular +, pubescent +  and glabrous +
scale-like +
8 cm80 mm <br />0.08 m <br /> - ? +
grooved +, disarticulating +  and dichotomous +
not brittle +
tomentose +  and floccose +
scabrellous +
spreading +  and erect +
spreading +  and erect +
whorled +, opposite +  and alternate +
Altered andesite wild buckwheat +
1300-2000 - -2500 m +
curved +  and straight +
unisexual +  and bisexual +
attenuate +
0.7 cm7 mm <br />0.007 m <br /> - 0.9 cm9 mm <br />0.009 m <br /> +
decumbent to erect +  and prostrate +
not fistulose +
slender;stout +
unwinged +  and winged +
black +, red +, brown +  and yellowish +
exserted +  and included +
pubescent +  and glabrous +
spheroidal +, 4-gonous +, lenticular +, biconvex +, discoid +, 3-gonous +  and 2-gonous +
Heavy clayey slopes, montane and subalpine conifer woodlands +
subcapitate +  and capitate +
5 cm50 mm <br />0.05 m <br /> - 10 cm100 mm <br />0.1 m <br /> +
cymelike +, paniclelike +, racemelike +  and spikelike +
5 cm50 mm <br />0.05 m <br /> - 10 cm100 mm <br />0.1 m <br /> +
connate +  and free +
1.1 cm11 mm <br />0.011 m <br /> - 1.3 cm13 mm <br />0.013 m <br /> +
0.8 cm8 mm <br />0.008 m <br /> - 1.1 cm11 mm <br />0.011 m <br /> +
thinly tomentose +  and lanate +
campanulate +
nonmembranous +
0.8 cm8 mm <br />0.008 m <br /> - 1.2 cm12 mm <br />0.012 m <br /> +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
creamy yellow;pale yellowish +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
4 cm40 mm <br />0.04 m <br /> - 5.5 cm55 mm <br />0.055 m <br /> +
tomentose +  and floccose +
1 cm10 mm <br />0.01 m <br /> - 4 cm40 mm <br />0.04 m <br /> +
Flowering Jun–Aug. +
homostylous +  and 3-carpellate +
Bull. Calif. Acad. Sci. +
kuyper1997a +
, +  and solid +
slender;stout +
well-defined +
persistent +
Endemic +  and Conservation concern +
0.7 cm7 mm <br />0.007 m <br /> - 0.9 cm9 mm <br />0.009 m <br /> +
decumbent to erect +  and prostrate +
prostrate +  and erect +
glandular +, pubescent +  and glabrous +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
2-lobed +  and cylindric +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
spreading;erect +
Eriogonum lobbii var. robustum +
chambered +  and solid +
slender +  and stout +
Eriogonum robustum +
Eriogonum subg. Oligogonum +
species +
emarginate +  and entire +
1/4 +  and 1/3 +
oblong-obovate +
coriaceous +
0.2 cm2 mm <br />0.002 m <br /> - 0.6 cm6 mm <br />0.006 m <br /> +
persistent +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
herb +  and matted +
tomentose +  and floccose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +