Eriogonum panamintense

C. V. Morton

J. Wash. Acad. Sci. 25: 308. 1935.

Common names: Panamint Mountain wild buckwheat
Endemic
Synonyms: Eriogonum racemosum var. desertorum S. Stokes Eriogonum reliquum S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 295. Mentioned on page 227, 235, 237.

Herbs, erect, 1.5–3 × 1–4 dm, tomentose, brownish. Stems slightly spreading to erect, without persistent leaf-bases, up to 1/5 height of plant; caudex stems absent; aerial flowering-stems erect, slender, solid, not fistulose, 0.5–1.5 dm, tomentose. Leaves basal, 1 per node; petiole 1–5 cm, tomentose; blade elliptic to ovate or obovate, 1.5–4 × 1–2.5 cm, white-tomentose abaxially, less so and often greenish adaxially, margins plane. Inflorescences cymose with involucres racemosely disposed at tips, (10–) 12–20 × 1–5 cm; branches dichotomous, tomentose; bracts 3, scalelike, narrowly triangular, and 1–4 mm, or leaflike, elliptic to oval, and 5–15 × 5–15 mm. Peduncles absent. Involucres 1 per node, turbinate, 3–5 × 2–4 mm, tomentose; teeth 5, erect, 0.4–0.8 mm. Flowers 3.5–5 mm; perianth white to whitish brown, glabrous; tepals connate proximal 1/4, monomorphic, oblanceolate; stamens exserted, 3–7 mm; filaments pilose proximally. Achenes light-brown, 2.5–3 mm, glabrous.


Phenology: Flowering May–Oct.
Habitat: Rocky to gravelly slopes and ridges, sagebrush and mountain mahogany communities, pinyon-juniper and montane conifer woodlands
Elevation: (1600-)1800-2900 m

Discussion

Eriogonum panamintense is widely scattered in the desert ranges from the southern tip of the White Mountains in Inyo County to the New York Mountains of San Bernardino County, California, eastward across Nevada in the Magruder and Silver Peak (Esmeralda County), Grapevine (Nye County), and Spring (Charleston) mountains (Clark County) of Nevada, on the Hualapai Mountains south of Kingman, and on Mt. Bangs south of Littlefield, Mohave County, Arizona. The Panamint Mountain wild buckwheat typically grows at elevations in California higher than does E. rupinum, but in Nevada their elevation ranges overlap, as in the Magruder Mountains and near Westgard Pass in the White Mountains.

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 panamintense"
light-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
C. V. Morton +
deciduous +  and persistent +
stipelike +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
white-tomentose +
elliptic;ovate or obovate +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
glandular +, pubescent +  and glabrous +
elliptic +  and oval +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not brittle +
spreading +  and erect +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Panamint Mountain wild buckwheat +
Ariz. +, Calif. +  and Nev. +
(1600-)1800-2900 m +
unisexual +, , +  and bisexual +
not attenuate +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 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 +
Rocky to gravelly slopes and ridges, sagebrush and mountain mahogany communities, pinyon-juniper and montane conifer woodlands +
reduced +
capitate +  and subcapitate +
10 cm100 mm <br />0.1 m <br /> (12 cm120 mm <br />0.12 m <br />) +
dense +  and diffuse +
12 cm120 mm <br />0.12 m <br /> (20 cm200 mm <br />0.2 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
1 cm10 mm <br />0.01 m <br /> (5 cm50 mm <br />0.05 m <br />) +
connate +  and free +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
nonmembranous +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
white;whitish brown +
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–Oct. +
homostylous +  and 3-carpellate +
J. Wash. Acad. Sci. +
, +  and solid +
slender;stout +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
decumbent to erect +  and prostrate +
slightly spreading +  and erect +
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 +
Eriogonum racemosum var. desertorum +  and Eriogonum reliquum +
chambered +  and solid +
slender +  and stout +
Eriogonum panamintense +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
0 +  and 1/2 +
oblanceolate +
coriaceous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +