Eriogonum brevicaule var. micranthum

(Nuttall) Reveal

Taxon 16: 410. 1967.

Common names: Red Desert wild buckwheat
Endemic
Basionym: Eriogonum micranthum Nuttall Proc. Acad. Nat. Sci. Philadelphia 4: 15. 1848
Synonyms: Eriogonum brevicaule subsp. orendense (A. Nelson) S. Stokes Eriogonum orendense
Treatment appears in FNA Volume 5. Treatment on page 266. Mentioned on page 265.

Plants erect, (0.8–) 1.5–5 × 2–5 dm. Aerial flowering-stems erect, 0.5–1 dm, densely tomentose to lanate. Leaves: blade oblanceolate to narrowly spatulate, 1.5–5 (–6) × (0.2–) 0.3–0.8 (–1.2) cm, margins plane. Inflorescences cymose, usually divide 3 or more times, 3–6 cm; branches tomentose. Involucres 1 per node, turbinate-campanulate, 2.5–3 × 2–2.5 mm, tomentose. Flowers (1–) 1.5–2.5 mm; perianth yellow or, rarely, ochroleucous, glabrous.


Phenology: Flowering Jun–Sep.
Habitat: Sandy to gravelly flats and slopes, mixed grassland and sagebrush communities
Elevation: (1700-)1800-2400(-2600) m

Discussion

Variety micranthum is restricted to the Red Desert region of southwestern Wyoming in Carbon, Fremont, Lincoln, Natrona, Sublette, Sweetwater, and Uinta counties.

Selected References

None.

Lower Taxa

None.

"/2" 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."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."dm" is not declared as a valid unit of measurement for this property.

light-brown;brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
(Nuttall) Reveal +
deciduous +  and persistent +
stipelike +
Eriogonum micranthum +
roughened +  and papillate +
awn-tipped +  and simple +
5 cm50 mm <br />0.05 m <br /> (6 cm60 mm <br />0.06 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (5 cm50 mm <br />0.05 m <br />) +
oblanceolate;narrowly spatulate +
0.3cm;0.8cm +
not awn-tipped +
leaflike +  and semileaflike +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +  and triangular +
not brittle +
spreading +  and erect +
scabrellous +
ridged +, angled +  and round +
whorled +, opposite +  and alternate +
Red Desert wild buckwheat +
(1700-)1800-2400(-2600) m +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
unisexual +, , +  and bisexual +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 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 +
Sandy to gravelly flats and slopes, mixed grassland and sagebrush communities +
reduced +
capitate +  and subcapitate +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
10 cm100 mm <br />0.1 m <br /> (15 cm150 mm <br />0.15 m <br />) +
dense +  and diffuse +
cymelike +, paniclelike +, racemelike +  and spikelike +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
connate +  and free +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
turbinate-campanulate +
nonmembranous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
7 cm70 mm <br />0.07 m <br /> (15 cm150 mm <br />0.15 m <br />) +
persistent +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
tomentose;floccose or glabrous +
erect to deflexed +
0.3 cm3 mm <br />0.003 m <br /> (3 cm30 mm <br />0.03 m <br />) +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
tomentose +  and floccose +
0.2 cm2 mm <br />0.002 m <br /> (2 cm20 mm <br />0.02 m <br />) +
Flowering Jun–Sep. +
homostylous +  and 3-carpellate +
, +  and solid +
slender;stout +
persistent +
decumbent to erect +  and prostrate +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
Eriogonum brevicaule subsp. orendense +  and Eriogonum orendense +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum brevicaule var. micranthum +
Eriogonum brevicaule +
variety +
emarginate +  and entire +
0 +  and 1/2 +
1/4 +  and 1/3 +
oblong +  and obovate or ovate +
coriaceous +
erect +  and spreading +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
greenish +  and green +
tomentose +  and floccose or glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +