Eriogonum nudum var. regirivum

Reveal & J. C. Stebbins

Phytologia 66: 247. 1989.

Common names: Kings River wild buckwheat
EndemicConservation concern
Treatment appears in FNA Volume 5. Treatment on page 313. Mentioned on page 309.

Plants 5–10 dm. Aerial flowering-stems not fistulose, 1–3 (–4) dm, lanate to tomentose. Leaves usually basal, rarely sheathing; blade 2–3.5 × 1.5–2.5 cm, lanate abaxially, tomentose adaxially, margins plane. Inflorescences cymose, 30–100 (–140) × 20–40 cm; branches lanate to tomentose. Involucres 1 per node, 3–4 mm, tomentose. Flowers 1.5–2 mm; perianth white, pubescent. 2n = 40.


Phenology: Flowering Aug–Nov.
Habitat: Limestone slopes, oak and pine woodlands
Elevation: 200-600 m

Discussion

Variety regirivum is a rare and localized taxon presently known only from the Pine Flat Reservoir area and near Dunlap in Fresno County. Most of the historic range of the taxon is now under Pine Flat Reservoir.

Selected References

None.

Lower Taxa

None.

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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 +
Reveal & J. C. Stebbins +
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 />) +
2 cm20 mm <br />0.02 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
tomentose +  and lanate +
oblanceolate;elliptic or ovate +
1.5 cm15 mm <br />0.015 m <br /> (2.5 cm25 mm <br />0.025 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 +
lanate +  and tomentose +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Kings River wild buckwheat +
200-600 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 +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
hollow +  and solid +
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 slopes, oak and pine woodlands +
reduced +
capitate +  and subcapitate +
100 cm1,000 mm <br />1 m <br /> (140 cm1,400 mm <br />1.4 m <br />) +
40 cm400 mm <br />0.4 m <br /> (80 cm800 mm <br />0.8 m <br />) +
dense +  and diffuse +
30 cm300 mm <br />0.3 m <br /> (100 cm1,000 mm <br />1 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
20 cm200 mm <br />0.2 m <br /> (40 cm400 mm <br />0.4 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 />) +
turbinate +  and turbinate-campanulate +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 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 +
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 Aug–Nov. +
homostylous +  and 3-carpellate +
, +  and solid +
slender;stout +
persistent +
Endemic +  and Conservation concern +
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. nudum +
chambered +  and solid +
slender +  and stout +
Eriogonum nudum var. regirivum +
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 +