Eriogonum ordii

S. Watson

Proc. Amer. Acad. Arts 21: 468. 1886.

Common names: Fort Mohave wild buckwheat
Endemic
Synonyms: Eriogonum tenuissimum Eastwood
Treatment appears in FNA Volume 5. Treatment on page 390. Mentioned on page 383.

Herbs, erect, annual, (0.5–) 1–7 dm, glabrous and sparsely floccose, greenish. Stems: caudex absent; aerial flowering-stems erect, solid, not fistulose, (0.3–) 0.7–3 dm, thinly floccose or glabrous, floccose proximally. Leaves basal, occasionally cauline; basal: petiole 2–6 (–10) cm, floccose, blade oblong-oblanceolate to obovate, (1.5–) 2–8 × (0.8–) 1–3 cm, thinly floccose or glabrous and green on both surfaces, margins entire; cauline: petiole 0.5–3 cm, thinly floccose, blade elliptic to obovate, 0.7–3 × 0.2–2 cm, similar to basal blade. Inflorescences paniculate, open to diffuse, (5–) 10–50 × 5–50 cm; branches not fistulose, glabrous except for floccose nodes and proximal branches; bracts 3, scalelike, 0.5–3 × 0.3–1 mm. Peduncles erect, straight, capillary, 0.5–2 cm, glabrous or thinly floccose. Involucres narrowly turbinate to turbinate, 1–1.5 (–1.8) × 0.6–1.2 mm, glabrous; teeth 4, erect, 0.2–0.5 mm. Flowers 1–2.5 (–3) mm; perianth white with greenish or reddish midribs to pale-yellow with greenish midribs, becoming pink to reddish, densely short-villous; tepals monomorphic, oblong to narrowly ovate; stamens exserted, 1–1.5 mm; filaments glabrous. Achenes dark-brown to black, 3-gonous, 1.8–2 mm, glabrous.


Phenology: Flowering Mar–Jul.
Habitat: Gravelly to clayey flats and slopes, mixed grassland communities, oak and conifer woodlands
Elevation: 200-1400 m

Discussion

Eriogonum ordii is infrequently encountered (rarely locally common) along the inner Coast Ranges from Monterey and San Benito counties south through Fresno, Merced, and San Luis Obispo counties to Ventura County, then eastward across northern Los Angeles County to the hills east of Bakersfield in Kern County. This distribution is based on confirmed modern collections. The type (J. G. Lemmon 4189, ASU, BM, DS, G, GH, ISC, K, P, UC, US) supposedly was collected near Fort Mohave, Mohave County, Arizona, in 1884. Two T. Brandegee specimens reportedly were gathered on the boundary of San Diego and Imperial counties, one at Split Mountain (Apr 1905, UC) and the second along San Felipe Creek (4 Apr 1901, UC). Brandegee’s label data often are dubious, and these disjunct sites are discounted.

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

... more about "Eriogonum ordii"
dark-brown;black +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
S. Watson +
deciduous +  and persistent +
stipelike +
Eriogonum sect. Ganysma +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1 cm10 mm <br />0.01 m <br />) +
0.7 cm7 mm <br />0.007 m <br /> (3 cm30 mm <br />0.03 m <br />) +
glabrous +  and floccose +
elliptic;obovate +
0.2 cm2 mm <br />0.002 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not awn-tipped +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
scabrellous +
not fistulose +
spreading +  and erect +
whorled +, opposite +  and alternate +
Fort Mohave wild buckwheat +
200-1400 m +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
unisexual +, , +  and bisexual +
not attenuate +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 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 +
Gravelly to clayey flats and slopes, mixed grassland communities, oak and conifer woodlands +
capitate +  and subcapitate +
5 cm50 mm <br />0.05 m <br /> (10 cm100 mm <br />0.1 m <br />) +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +
connate +  and free +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
narrowly turbinate +  and turbinate +
nonmembranous +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
cauline +  and basal +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
greenish +, pale-yellow +  and reddish +
not swollen +
orthotropous +
accrescent +
floccose;glabrous +
erect to deflexed +
capillary +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
short-villous +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
6 cm60 mm <br />0.06 m <br /> (10 cm100 mm <br />0.1 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Mar–Jul. +
homostylous +  and 3-carpellate +
Proc. Amer. Acad. Arts +
, +  and solid +
slender;stout +
persistent +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
decumbent to erect +  and prostrate +
spreading +  and erect +
glabrous +, short-hispid +, villous +, hirsute +, floccose +  and tomentose +
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 tenuissimum +
chambered +  and solid +
slender +  and stout +
Eriogonum ordii +
Eriogonum subg. Ganysma +
species +
emarginate +  and entire +
1/5 +  and 1/2 +
oblong +  and narrowly ovate +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and perennial +
floccose +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +