Eriogonum collinum

S. Stokes ex M. E. Jones

Contr. W. Bot. 11: 15. 1903.

Common names: Juniper wild buckwheat
Endemic
Treatment appears in FNA Volume 5. Treatment on page 406. Mentioned on page 384.

Herbs, erect or spreading, annual, 1–5 (–7) dm, glabrous or infrequently slightly floccose, greenish, grayish, or reddish. Stems: caudex absent; aerial flowering-stems erect, solid, not fistulose, 0.3–1 dm, glabrous, infrequently slightly floccose proximally. Leaves basal; petiole 1–5 cm, floccose; blade elliptic to obovate or orbiculate, (0.5–) 1–2.5 (–3) × (0.5–) 1–3 (3.5) cm, tomentose to hirsute abaxially, floccose or glabrous and greenish adaxially, margins plane. Inflorescences cymose to cymose-paniculate or racemose, open, 5–60 × 5–45 cm; branches glabrous; bracts 3, scalelike, 1–2 (–4) × 1–2 mm. Peduncles ascending, curving, slender, 1–5 cm, glabrous. Involucres turbinate, (1.5–) 2–3 × (1–) 1.5–2.5 mm, glabrous; teeth 5, erect, 0.5–1 mm. Flowers 1–2.5 mm; perianth white to pale-yellow, glabrous, pustulose proximally; tepals monomorphic, lanceolate to spatulate or ovate; stamens included, 1–1.8 mm; filaments glabrous. Achenes brown, lenticular, 2–2.5 mm, glabrous. 2n = 36.


Phenology: Flowering May–Nov.
Habitat: Sandy to clayey or gravelly washes, flats, and slopes, saltbush, greasewood, sagebrush, and mountain mahogany communities, pinyon and/or juniper woodlands
Elevation: 1300-2000 m

Distribution

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Calif., Nev., Oreg.

Discussion

Eriogonum collinum is infrequent to locally common in the Lahontan Basin region of the Intermountain West in northeastern California (Lassen and Modoc counties), south-central Oregon (Lake County), and northwestern Nevada (Douglas, Humboldt, Lyon, Pershing, Storey, and Washoe counties).

Selected References

None.

Lower Taxa

None.

"dm" is not declared as a valid unit of measurement for this property."dm" is not declared as a valid unit of measurement for this property.

... more about "Eriogonum collinum"
included +  and exserted +
lenticular +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
S. Stokes ex M. E. Jones +
deciduous +  and persistent +
stipelike +
Eriogonum sect. Ganysma +
awn-tipped +  and simple +
2.5 cm25 mm <br />0.025 m <br /> - 3 cm30 mm <br />0.03 m <br /> +
3.5 cm35 mm <br />0.035 m <br /> - 0.5 cm5 mm <br />0.005 m <br /> +
1 cm10 mm <br />0.01 m <br /> - 2.5 cm25 mm <br />0.025 m <br /> +
tomentose +  and hirsute abaxially +
elliptic;obovate or orbiculate +
1 cm10 mm <br />0.01 m <br /> - 3 cm30 mm <br />0.03 m <br /> +
not awn-tipped +
0.2 cm2 mm <br />0.002 m <br /> - 0.4 cm4 mm <br />0.004 m <br /> +
0.1 cm1 mm <br />0.001 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
glandular +, pubescent +  and glabrous +
scale-like +
0.1 cm1 mm <br />0.001 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
grooved +, disarticulating +  and dichotomous +
not brittle +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Juniper wild buckwheat +
Calif. +, Nev. +  and Oreg. +
1300-2000 m +
unisexual +, , +  and bisexual +
not attenuate +
0.1 cm1 mm <br />0.001 m <br /> - 0.25 cm2.5 mm <br />0.0025 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 +
Sandy to clayey or gravelly washes, flats, and slopes, saltbush, greasewood, sagebrush, and mountain mahogany communities, pinyon and/or juniper woodlands +
open +  and cymose +
capitate +  and subcapitate +
racemose +  and cymose-paniculate +
5 cm50 mm <br />0.05 m <br /> - 60 cm600 mm <br />0.6 m <br /> +
cymelike +, paniclelike +, racemelike +  and spikelike +
5 cm50 mm <br />0.05 m <br /> - 45 cm450 mm <br />0.45 m <br /> +
connate +  and free +
0.15 cm1.5 mm <br />0.0015 m <br /> - 0.2 cm2 mm <br />0.002 m <br /> +
0.1 cm1 mm <br />0.001 m <br /> - 0.15 cm1.5 mm <br />0.0015 m <br /> +
0.2 cm2 mm <br />0.002 m <br /> - 0.3 cm3 mm <br />0.003 m <br /> +
nonmembranous +
0.15 cm1.5 mm <br />0.0015 m <br /> - 0.25 cm2.5 mm <br />0.0025 m <br /> +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
erect to deflexed +
filiform;capillary +
1 cm10 mm <br />0.01 m <br /> - 5 cm50 mm <br />0.05 m <br /> +
white;pale-yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
1 cm10 mm <br />0.01 m <br /> - 5 cm50 mm <br />0.05 m <br /> +
Flowering May–Nov. +
homostylous +  and 3-carpellate +
Contr. W. Bot. +
, +  and solid +
slender;stout +
persistent +
0.1 cm1 mm <br />0.001 m <br /> - 0.18 cm1.8 mm <br />0.0018 m <br /> +
decumbent to erect +  and prostrate +
spreading +  and erect +
glabrous +, short-hispid +, villous +, hirsute +, floccose +  and tomentose +
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 +
chambered +  and solid +
slender +  and stout +
Eriogonum collinum +
Eriogonum subg. Ganysma +
species +
emarginate +  and entire +
1/5 +  and 1/2 +
lanceolate +  and spatulate or ovate +
coriaceous +
0.05 cm0.5 mm <br />5.0e-4 m <br /> - 0.1 cm1 mm <br />0.001 m <br /> +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and perennial +
reddish +, grayish +  and greenish +
floccose +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +