Eriogonum prattenianum var. prattenianum

Common names: Nevada City wild buckwheat
Endemic
Synonyms: Eriogonum umbellatum subsp. serratum S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 359.

Herbs, mats, to erect subshrubs, 3–5 dm. Leaf-blades tomentose on both surfaces. Involucres 5–8 mm wide; teeth erect to slightly reflexed, 1–2 mm. Flowers usually 5–8 mm.


Phenology: Flowering May–Jul.
Habitat: Volcanic or granitic flats and slopes, manzanita and buckbrush communities, oak and montane conifer woodlands
Elevation: 800-2200 m

Discussion

Variety prattenianum is widely scattered in disjunct populations along the western slope of the northern and central Sierra Nevada (Calaveras, El Dorado, Madera, Mariposa, Nevada, Placer, and Tuolumne counties) from Nevada City in the north to Chowchilla Mountain in the south.

Selected References

None.

Lower Taxa

None.

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light;rusty brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Durand +
deciduous +  and persistent +
stipelike +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
white-tomentose +
plane;elliptic;ovate +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not awn-tipped +
glandular +, pubescent +  and glabrous +
scale-like +
grooved +, disarticulating +  and dichotomous +
not brittle +
tomentose +  and floccose or glabrous +
scabrellous +
spreading +  and erect +
spreading +  and erect +
whorled +, opposite +  and alternate +
Nevada City wild buckwheat +
800-2200 m +
curved +  and straight +
unisexual +  and bisexual +
attenuate +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
decumbent to erect +  and prostrate +
0.7 cm7 mm <br />0.007 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not fistulose +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
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 +
Volcanic or granitic flats and slopes, manzanita and buckbrush communities, oak and montane conifer woodlands +
open +, simple +  and compound-umbellate +
cymelike +, paniclelike +, racemelike +  and spikelike +
0.8 cm8 mm <br />0.008 m <br /> (2 cm20 mm <br />0.02 m <br />) +
connate +  and free +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
campanulate +
nonmembranous +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
cauline +  and basal +
bractlike +
subglabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering May–Jul. +
homostylous +  and 3-carpellate +
J. Acad. Nat. Sci. Philadelphia, n. s. +
, +  and solid +
slender;stout +
persistent +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
decumbent to erect +  and prostrate +
prostrate +  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 umbellatum subsp. serratum +
chambered +  and solid +
slender +  and stout +
Eriogonum prattenianum var. prattenianum +
Eriogonum prattenianum +
variety +
emarginate +  and entire +
1/4 +  and 1/3 +
spatulate +  and obovate +
coriaceous +
erect +  and slightly reflexed +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
erect;spreading;erect;spreading +
synoecious +, monocarpic +, polycarpic +  and , +
midlength +
3 +, 2 +  and 1 +