Eriogonum umbellatum var. furcosum

Reveal

Great Basin Naturalist 45: 278. 1985.

Common names: Sierra Nevada sulphur flower
Endemic
Treatment appears in FNA Volume 5. Treatment on page 347. Mentioned on page 337, 348.

Subshrubs, spreading to rounded, 3–6 × 3–8 dm. Aerial flowering-stems erect, 0.5–2 dm, sparsely floccose or glabrous, without one or more leaflike bracts ca. midlength. Leaves in loose rosettes; blade elliptic to oblong, (0.7–) 1–2.5 (–3) × 0.3–0.8 (–1.3) cm, white-tomentose abaxially, floccose to mostly glabrous and green adaxially, margins plane. Inflorescences compound-umbellate, branched 2–4 times; branches without a whorl of bracts ca. midlength; involucral tubes 2–3 (–4.5) mm, lobes 1.5–3 (–4) mm. Flowers (5–) 6–8 mm; perianth bright-yellow.


Phenology: Flowering Jun–Sep.
Habitat: Sandy to gravelly flats and slopes, sagebrush communities, oak and montane conifer woodlands
Elevation: 1200-3000 m

Discussion

Variety furcosum is the common, compound-umbellate form of the species encountered in the Sierra Nevada of California (Alpine, Amador, Calaveras, El Dorado, Fresno, Inyo, Kern, Madera, Mariposa, Mono, Nevada, Placer, Sierra, Tulare, and Tuolumne counties) and in the Mt. Rose/Slide Mountain area of southern Washoe County, Nevada.

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."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 +
James L. Reveal +
Reveal +
deciduous +  and persistent +
stipelike +
0.13 cm1.3 mm <br />0.0013 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
awn-tipped +  and simple +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
0.8 cm8 mm <br />0.008 m <br /> (1.3 cm13 mm <br />0.013 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
floccose +  and mostly glabrous +
elliptic;oblong +
0.3 cm3 mm <br />0.003 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
not awn-tipped +
0.1 cm1 mm <br />0.001 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
midlength +
glandular +, pubescent +  and glabrous +
3;several +
scale-like +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
tomentose +  and floccose or glabrous +
scabrellous +
spreading +  and erect +
whorled +, opposite +  and alternate +
Sierra Nevada sulphur flower +
Calif. +  and Nev. +
1200-3000 m +
curved +  and straight +
0.5 cm5 mm <br />0.005 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
unisexual +  and bisexual +
attenuate +
0.6 cm6 mm <br />0.006 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
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 to gravelly flats and slopes, sagebrush communities, oak and montane conifer woodlands +
2-4 times +
branched +  and compound-umbellate +
capitate +  and subcapitate +
3 cm30 mm <br />0.03 m <br /> (25 cm250 mm <br />0.25 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
2 cm20 mm <br />0.02 m <br /> (18 cm180 mm <br />0.18 m <br />) +
connate +  and free +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
tomentose +  and thinly floccose or glabrous +
turbinate +  and campanulate +
nonmembranous +
0.15 cm1.5 mm <br />0.0015 m <br /> (1 cm10 mm <br />0.01 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
cauline +  and basal +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
bright-yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
mostly tomentose +  and floccose or glabrous +
0.1 cm1 mm <br />0.001 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Jun–Sep. +
homostylous +  and 3-carpellate +
0.3 cm3 mm <br />0.003 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (1.8 cm18 mm <br />0.018 m <br />) +
Great Basin Naturalist +
, +  and solid +
slender;stout +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.8 cm8 mm <br />0.008 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 +
chambered +  and solid +
slender +  and stout +
Eriogonum umbellatum var. furcosum +
Eriogonum umbellatum +
variety +
emarginate +  and entire +
1/4 +  and 1/3 +
usually spatulate +  and obovate +
coriaceous +
0.4 cm4 mm <br />0.004 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
involucral +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
membranous +
pubescent +  and glabrous +
sericeous +, lanate +  and tomentose floccose or glabrous +
dioecious +, polygamodioecious +, synoecious +  and polycarpic +
annual +, biennial +  and perennial +
tomentose +  and glabrous +
midlength +
3 +, 2 +  and 1 +