Eriogonum umbellatum var. versicolor

S. Stokes

Leafl. W. Bot. 3: 17. 1941.

Common names: Panamint sulphur flower
IllustratedEndemic
Treatment appears in FNA Volume 5. Treatment on page 350. Mentioned on page 336, 337, 351.

Herbs, spreading to somewhat prostrate mats, 1–3 × 1–4 dm. Aerial flowering-stems usually erect, 0.5–1.5 dm, floccose, without one or more leaflike bracts ca. midlength. Leaves mostly in loose rosettes; blade usually elliptic, 0.5–1.5 × 0.3–1 cm, thinly tomentose on both surfaces, sometimes nearly or quite glabrous and green or becoming reddish adaxially, margins plane. Inflorescences umbellate or compound-umbellate; branches 0.5–1 dm, without a whorl of bracts ca. midlength, floccose; involucral tubes 2–3 mm, lobes 1–2 mm. Flowers 3–6 mm; perianth yellow, becoming reddish-brown to rose or pink, with large reddish spot on each midrib.


Phenology: Flowering Jun–Sep.
Habitat: Gravelly to rocky flats, slopes, and ridges, sagebrush communities, montane conifer woodlands
Elevation: 1900-3300 m

Discussion

Variety versicolor occurs infrequently in scattered mountain ranges across southern Nevada (Clark, Eureka, Lincoln, Lyon, Nye, and White Pine counties) and into California (eastern Inyo and Mono counties), where it may be somewhat more common. It occasionally is difficult to distinguish, as it approaches both var. dichrocephalum and var. juniporinum in nearly all features except flower color, a trait that is distinctive and consistent in the field. Throughout its range, plants with both simple and branched inflorescences may be observed, the branched expression being the more common one. Variety versicolor is found infrequently in cultivation and ought to be more commonly used.

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 +
James L. Reveal +
S. Stokes +
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 +
3 cm30 mm <br />0.03 m <br /> (4 cm40 mm <br />0.04 m <br />) +
reddish +  and green +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
glabrous +  and tomentose +
oblanceolate;elliptic +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 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 +
scabrellous +
spreading +  and erect +
whorled +, opposite +  and alternate +
Panamint sulphur flower +
Calif. +  and Nev. +
1900-3300 m +
curved +  and straight +
1 cm10 mm <br />0.01 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
unisexual +  and bisexual +
attenuate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 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 +
Gravelly to rocky flats, slopes, and ridges, sagebrush communities, montane conifer woodlands +
compound-umbellate +  and 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 +
bractlike +
pubescent +  and glabrous +
spreading to somewhat +
reddish spot +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
reddish-brown;rose or pink +
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 />) +
Leafl. W. Bot. +
, +  and solid +
slender;stout +
persistent +
Illustrated +  and Endemic +
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. versicolor +
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 />) +
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 +