Eriogonum corymbosum var. aureum

(M. E. Jones) Reveal

Taxon 32: 293. 1983.

Common names: Golden wild buckwheat
EndemicConservation concern
Basionym: Eriogonum aureum M. E. Jones Proc. Calif. Acad. Sci., ser. 2, 5: 718. 1895
Synonyms: Eriogonum microthecum subsp. aureum (M. E. Jones) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 259. Mentioned on page 256.
Revision as of 09:31, 30 July 2020 by imported>Volume Importer
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Subshrubs or shrubs, 2–6 (–8) × 3–8 (–12) dm. Leaves cauline 1/2 or more length of flowering-stem; petiole 0.5–0.8 cm; blade usually elliptic, 2–4 × 1–1.5 cm, densely tomentose abaxially, usually glabrous and green adaxially. Inflorescences 3–10 cm; branches glabrous or nearly so. Involucres 1–2 × 1–1.5 (–2) mm. Flowers 1.5–2.5 mm; perianth yellow to pale-yellow, rarely nearly white, glabrous.


Phenology: Flowering Aug–Oct.
Habitat: Gravelly slopes, creosote and blackbrush communities, juniper woodlands
Elevation: 1000-1100 m

Discussion

Variety aureum is known only from Shivwits Hill near Castle Cliffs in Washington County. This rare expression is probably the result of past introgression with the no longer sympatric herbaceous perennial Eriogonum thompsoniae.

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.

0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
(M. E. Jones) Reveal +
deciduous +  and persistent +
stipelike +
Eriogonum aureum +
occasional +
papillate +
awn-tipped +  and simple +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
glabrous +  and tomentose +
cordate;lanceolate;oblanceolate or elliptic +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
not awn-tipped +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
glandular +, pubescent +  and glabrous +
triangular +  and scale-like +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not brittle +
spreading +  and erect +
nearly +  and glabrous +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Golden wild buckwheat +
1000-1100 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 /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
stout;slender +
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 slopes, creosote and blackbrush communities, juniper woodlands +
reduced +
open +, umbellate +, capitate +  and cymose +
capitate +  and subcapitate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
3 cm30 mm <br />0.03 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2 cm20 mm <br />0.02 m <br /> (25 cm250 mm <br />0.25 m <br />) +
connate +  and free +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
crenulate +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
white;yellow;pale-yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
tomentose +  and floccose +
0.5 cm5 mm <br />0.005 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
Flowering Aug–Oct. +
homostylous +  and 3-carpellate +
, +  and solid +
slender;stout +
persistent +
Endemic +  and Conservation concern +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
included +  and slightly exserted +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
decumbent to erect +  and prostrate +
erect +  and spreading +
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 microthecum subsp. aureum +
chambered +  and solid +
slender +  and stout +
Eriogonum corymbosum var. aureum +
Eriogonum corymbosum +
variety +
emarginate +  and entire +
0 +  and 1/2 +
1/4 +  and 1/3 +
oblanceolate +  and spatulate +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
greenish +  and grayish +
shrub +  and subshrub +
erect;spreading;erect;spreading +
reddish-brown-tomentose +  and floccose or glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +