Eriogonum brevicaule var. nanum

(Reveal) S. L. Welsh

Great Basin Naturalist 44: 531. 1984.

Common names: Dwarf wild buckwheat
Endemic
Basionym: Eriogonum nanum Reveal Phytologia. 25: 194. 1973
Synonyms: Eriogonum grayi Reveal
Treatment appears in FNA Volume 5. Treatment on page 267. Mentioned on page 264, 265.

Plants pulvinate and cespitose, 0.3–1.5 (–1.8) × 1–2.5 dm. Aerial flowering-stems erect or nearly so, usually scapelike, (0.2–) 0.4–1.5 dm, glabrous. Leaves: blade narrowly oblanceolate to narrowly elliptic, 0.3–2 × 0.2–0.5 (–0.7) cm, densely white-tomentose abaxially, floccose and greenish adaxially, margins crenulate. Inflorescences capitate or open and umbellate, 1–5 cm; branches absent or typically glabrous. Involucres 3–7 (–9) per cluster, turbinate, 1.5–3 × 1–2.5 mm, glabrous or thinly floccose. Flowers 2–3 mm; perianth greenish to creamy or pale yellowish-white, rarely pale-yellow or yellow, glabrous.


Phenology: Flowering Jul–Sep.
Habitat: Gravelly to rocky, mostly limestone slopes and ridge tops, high-elevation sagebrush communities, subalpine conifer woodlands
Elevation: 2400-2600 m

Discussion

Variety nanum is restricted to the Wasatch Mountains in Box Elder and Weber 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 +
(Reveal) S. L. Welsh +
deciduous +  and persistent +
stipelike +
Eriogonum nanum +
roughened +  and papillate +
awn-tipped +  and simple +
10 cm100 mm <br />0.1 m <br /> (12 cm120 mm <br />0.12 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (2 cm20 mm <br />0.02 m <br />) +
floccose +  and white-tomentose +
narrowly oblanceolate;narrowly elliptic +
0.2cm;0.5cm +
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 +
Dwarf wild buckwheat +
2400-2600 m +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unisexual +, , +  and bisexual +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 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 +
Gravelly to rocky, mostly limestone slopes and ridge tops, high-elevation sagebrush communities, subalpine conifer woodlands +
reduced +
umbellate +, open +  and capitate +
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 +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 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 />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
floccose +  and glabrous +
nonmembranous +
0.1 cm1 mm <br />0.001 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 +
crenulate +
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 Jul–Sep. +
homostylous +  and 3-carpellate +
Great Basin Naturalist +
, +  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 grayi +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum brevicaule var. nanum +
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 +
plant +  and cespitose +
tomentose +  and floccose or glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +