Eriogonum flavum var. flavum

Common names: Alpine golden wild buckwheat
IllustratedEndemic
Synonyms: Eriogonum flavum subsp. crassifolium (Bentham) S. Stokes Eriogonum flavum var. linguifolium S. Stokes Eriogonum flavum var. muticum
Treatment appears in FNA Volume 5. Treatment on page 372. Mentioned on page 371.

Plants tight, compact mats, 1–3 (–5) dm wide. Aerial flowering-stems mostly erect, 0.1–2 dm. Leaf-blades usually elliptic, 1–5 × 0.3–1.5 cm, densely tomentose abaxially, tomentose to floccose and greenish adaxially. Inflorescences umbellate; branches 4–20 cm. Involucres turbinate to campanulate, 3–8 mm. Flowers 3–7 mm, including 0.3–1 mm stipelike base; perianth bright-yellow. 2n = 80.


Phenology: Flowering Jun–Sep.
Habitat: Clayey or sandy to gravelly flats and slopes, mixed grassland and sagebrush communities, montane conifer woodlands, high-elevation sagebrush communities, subalpine or alpine conifer woodlands
Elevation: 500-3200 m

Distribution

V5 765-distribution-map.gif

Alta., Man., Sask., Colo., Mont., Nebr., N.Dak., S.Dak., Wyo.

Discussion

Variety flavum is widespread and rather common on the short-grass prairies of the Great Plains from Alberta, southwestern Manitoba, and Saskatchewan south through North Dakota, South Dakota, Nebraska, and eastern Colorado, westward across the plains and into the mountains of Montana and Wyoming. It occasionally is cultivated and, while slow-growing, it will, given time, form nice mats, with a fair profusion of inflorescences bearing bright yellow flowers.

Selected References

None.

Lower Taxa

None.

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light-brown;brown +
included +  and exserted +
3-gonous +, lenticular +  and ridged +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Nuttall +
deciduous +  and persistent +
stipelike +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
awn-tipped +  and simple +
7 cm70 mm <br />0.07 m <br /> (9 cm90 mm <br />0.09 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
green +  and whitish +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
mostly tomentose +  and floccose or glabrous +
linear-oblanceolate;oblong or elliptic +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +  and semileaflike +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
tomentose +  and floccose +
scabrellous +
ridged +, angled +  and round +
4 cm40 mm <br />0.04 m <br /> (20 cm200 mm <br />0.2 m <br />) +
spreading +  and erect +
whorled +, opposite +  and alternate +
Alpine golden wild buckwheat +
Alta. +, Man. +, Sask. +, Colo. +, Mont. +, Nebr. +, N.Dak. +, S.Dak. +  and Wyo. +
500-3200 m +
straight +  and curved +
unisexual +, , +  and bisexual +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
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 +
Clayey or sandy to gravelly flats and slopes, mixed grassland and sagebrush communities, montane conifer woodlands, high-elevation sagebrush communities, subalpine or alpine conifer woodlands +
capitate +  and subcapitate +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.3 cm3 mm <br />0.003 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
tomentose +  and floccose +
turbinate +  and campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
nonmembranous +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
tomentose +  and floccose +
0.3cm;1.5cm +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
bright-yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
tomentose +  and floccose +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Jun–Sep. +
homostylous +  and 3-carpellate +
Cat. Pl. Upper Louisiana, no. +
, +  and solid +
slender;stout +
persistent +
Illustrated +  and Endemic +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
decumbent to erect +  and prostrate +
prostrate +  and erect +
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 flavum subsp. crassifolium +, Eriogonum flavum var. linguifolium +  and Eriogonum flavum var. muticum +
chambered +  and solid +
slender +  and stout +
Eriogonum flavum var. flavum +
Eriogonum flavum +
variety +
emarginate +  and entire +
0 +  and 1/2 +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +, biennial +  and perennial +
tomentose +  and floccose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +