Eriogonum nudum var. pauciflorum

S. Watson

Proc. Amer. Acad. Arts 12: 264. 1877.

Common names: Little-flower wild buckwheat
Endemic
Synonyms: Eriogonum latifolium subsp. pauciflorum (S. Watson) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 311. Mentioned on page 309, 310, 423.

Plants 3–8 dm. Aerial flowering-stems rarely slightly fistulose, 1.5–5 dm, glabrous. Leaves basal; blade 1.5–3 × 0.8–1.8 cm, densely tomentose abaxially, glabrous adaxially, margins plane. Inflorescences cymose, 20–50 × 10–30 cm; branches glabrous. Involucres 1 (–2) per cluster, 5–7 mm, glabrous or sparsely pubescent. Flowers 2–2.5 mm; perianth white or, rarely, yellow, glabrous or pubescent. 2n = 40.


Phenology: Flowering Jun–Oct.
Habitat: Sandy, often granitic flats and slopes, grassland, saltbush, chaparral, and sagebrush communities, oak and montane conifer woodlands
Elevation: 1100-2800 m

Distribution

V5 620-distribution-map.gif

Calif., Mexico (Baja California)

Discussion

Variety pauciflorum is the southern montane, tetraploid expression of the species. It occurs in the Transverse Ranges, southward in the Peninsular Ranges of southern California (Kern, Los Angeles, Orange, Riverside, San Bernardino, San Diego, Santa Barbara, and Ventura counties), and south to the mountains of northern Baja California. Care must be taken when identifying specimens from the San Jacinto and Santa Rosa mountains in Riverside County to ascertain the age of the plants, as the annual Eriogonum molestum can closely resemble the perennial var. pauciflorum. The yellow-flowered expression of var. pauciflorum is worthy of cultivation.

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 +
acute;obtuse or rounded +
James L. Reveal +
S. Watson +
deciduous +  and persistent +
stipelike +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (3 cm30 mm <br />0.03 m <br />) +
glabrous +  and tomentose +
oblanceolate;elliptic or ovate +
0.8 cm8 mm <br />0.008 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
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 +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not brittle +
spreading +  and erect +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Little-flower wild buckwheat +
Calif. +  and Mexico (Baja California) +
1100-2800 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 +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
hollow +  and solid +
decumbent to erect +  and prostrate +
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 +
Sandy, often granitic flats and slopes, grassland, saltbush, chaparral, and sagebrush communities, oak and montane conifer woodlands +
reduced +
capitate +  and subcapitate +
100 cm1,000 mm <br />1 m <br /> (150 cm1,500 mm <br />1.5 m <br />) +
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
dense +  and diffuse +
20 cm200 mm <br />0.2 m <br /> (50 cm500 mm <br />0.5 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
connate +  and free +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
pubescent +  and glabrous +
turbinate +  and turbinate-campanulate +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 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 +
yellow;,;white +
pubescent +  and glabrous +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
tomentose +  and glabrous +
1 cm10 mm <br />0.01 m <br /> (10 cm100 mm <br />0.1 m <br />) +
Flowering Jun–Oct. +
homostylous +  and 3-carpellate +
Proc. Amer. Acad. Arts +
, +  and solid +
slender;stout +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
decumbent to erect +  and prostrate +
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 latifolium subsp. pauciflorum +
chambered +  and solid +
slender +  and stout +
Eriogonum nudum var. pauciflorum +
Eriogonum nudum +
variety +
emarginate +  and entire +
0 +  and 1/2 +
oblong +  and obovate +
coriaceous +
spreading +  and erect +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.06 cm0.6 mm <br />6.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
grayish +  and greenish +
floccose +  and tomentose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +