Eriogonum heermannii var. humilius

(S. Stokes) Reveal

Aliso 7: 226. 1970.

Common names: Heermann’s Great Basin wild buckwheat
IllustratedEndemic
Basionym: Eriogonum heermannii subsp. humilius S. Stokes Eriogonum, 90. 1936 (as heermanni)
Treatment appears in FNA Volume 5. Treatment on page 305. Mentioned on page 304, 306.

Shrubs or subshrubs, spreading to rounded, usually sparsely branched, 3–7 × 5–12 (–15) dm. Leaf-blades oblanceolate to spatulate, 0.8–1.5 × 0.4–0.8 cm, floccose or glabrous abaxially. Inflorescences 3–15 (–23) × 5–20 cm; branches usually diffuse with dichotomously arranged involucres, slender, round, smooth, glabrous, not spinose. Involucres campanulate, 1–1.5 × 1.5–3 mm. Flowers 2.5–3 mm; perianth white.


Phenology: Flowering Jun–Oct.
Habitat: Limestone or volcanic flats, washes, and slopes, saltbush and sagebrush communities, pinyon-juniper and montane conifer woodlands
Elevation: 1100-2500 m

Discussion

Variety humilius is the common expression of the species in the northern Great Basin, extending from Mono and Inyo counties, California, northeast across Nevada (Carson City, Churchill, Douglas, Elko, Esmeralda, Eureka, Humboldt, Lander, Lyon, Mineral, Nye, Pershing, Storey, and Washoe counties). Plants are usually scattered and the variety is rarely a local dominant; it often grows in volcanic soils. Variety humilius is worthy of cultivation; the large shrubs, when in full flower, can be spectacular.

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.

light-brown;brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
(S. Stokes) Reveal +
deciduous +  and persistent +
stipelike +
Eriogonum heermannii subsp. humilius +
papillate +
awn-tipped +  and simple +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
tomentose +  and floccose or glabrous abaxially +
oblong;elliptic;spatulate;oblanceolate;oblong;elliptic;spatulate;oblanceolate;linear +
0.1 cm1 mm <br />0.001 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
glandular +, pubescent +  and glabrous +
scale-like +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
grooved +  and dichotomous +
not brittle +
spreading +  and erect +
scabrellous +
slender +
spreading +  and erect +
whorled +, opposite +  and alternate +
Heermann’s Great Basin wild buckwheat +
Calif. +  and Nev. +
1100-2500 m +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unisexual +, , +  and bisexual +
not attenuate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 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 +
Limestone or volcanic flats, washes, and slopes, saltbush and sagebrush communities, pinyon-juniper and montane conifer woodlands +
reduced +
capitate +  and subcapitate +
15 cm150 mm <br />0.15 m <br /> (23 cm230 mm <br />0.23 m <br />) +
30 cm300 mm <br />0.3 m <br /> (35 cm350 mm <br />0.35 m <br />) +
dense +  and diffuse +
3 cm30 mm <br />0.03 m <br /> (15 cm150 mm <br />0.15 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
5 cm50 mm <br />0.05 m <br /> (20 cm200 mm <br />0.2 m <br />) +
connate +  and free +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
floccose +  and glabrous +
campanulate +
nonmembranous +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
glabrous +  and floccose +
oblanceolate +  and spatulate +
0.4cm;0.8cm +
in whorls +, opposite +, alternate +  and rosulate +
deciduous +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
glabrous +  and floccose +
0.1 cm1 mm <br />0.001 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
Flowering Jun–Oct. +
homostylous +  and 3-carpellate +
, +  and solid +
slender;stout +
persistent +
Illustrated +  and Endemic +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
decumbent to erect +  and prostrate +
erect +  and spreading +
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 +
chambered +  and solid +
slender +  and stout +
Eriogonum heermannii var. humilius +
Eriogonum heermannii +
variety +
emarginate +  and entire +
in proximal 1/2 +  and connate +
0 +  and 1/2 +
lobed +  and laciniate +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
grayish +  and greenish +
subshrub +  and shrub +
spreading;spreading +
floccose +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +