Eriogonum viscidulum

J. T. Howell

Leafl. W. Bot. 3: 138. 1942.

Common names: Sticky wild buckwheat
EndemicConservation concern
Treatment appears in FNA Volume 5. Treatment on page 406. Mentioned on page 385.

Herbs, erect or spreading, annual, 0.5–4 (–5) dm, minutely viscid, yellowish green. Stems: caudex absent; aerial flowering-stems erect, solid, not fistulose, 0.2–1 dm, minutely viscid. Leaves basal; petiole 0.5–4 cm, floccose; blade elliptic to broadly ovate, 0.5–3 × 0.5–3 cm, densely white-tomentose abaxially, thinly floccose to glabrate and greenish adaxially, margins plane. Inflorescences cymose, open, 3–35 × 3–30 cm; branches minutely viscid; bracts 3, scalelike, 1–2 × 1–2 mm. Peduncles erect or nearly so, straight, filiform, 0.5–1.5 cm, viscid. Involucres narrowly turbinate, 1–1.2 × 0.6–0.8 mm, viscid; teeth 4, erect, 0.3–0.5 mm. Flowers 1.3–1.5 mm in early anthesis, becoming 1.5–2 mm; perianth pale-yellow to yellow in early anthesis, becoming tinged with red, glabrous; tepals monomorphic, oblong; stamens included, 0.9–1.1 mm; filaments glabrous. Achenes light to dark-brown, 3-gonous, 0.8–1 mm, glabrous.


Phenology: Flowering Apr–Jun.
Habitat: Sandy flats and slopes, saltbush and creosote bush communities
Elevation: 400-600 m

Discussion

Of conservation concern.

Eriogonum viscidulum is a rare and localized species known from a few locations in Clark County, Nevada, and adjacent Mohave County, Arizona. Its range extends from the Muddy River near Weiser Wash to the confluence with the Virgin River, and from Sandy Hollow Wash to Middle Point on the Colorado River. It is listed for protection by the state of Nevada and is considered a “sensitive” species by the Bureau of Land Management and the Nevada Heritage Program. In Arizona, it is a “special status species.”

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.

... more about "Eriogonum viscidulum"
light;dark-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
J. T. Howell +
deciduous +  and persistent +
stipelike +
Eriogonum sect. Ganysma +
awn-tipped +  and simple +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
thinly floccose +  and glabrate +
elliptic;broadly ovate +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
not awn-tipped +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
puberulent +, pilose-pubescent +, hispid +, sericeous +, floccose +, tomentose +  and lanate +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Sticky wild buckwheat +
Ariz. +  and Nev. +
400-600 m +
unisexual +, , +  and bisexual +
not attenuate +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
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 +
Sandy flats and slopes, saltbush and creosote bush communities +
open +  and cymose +
capitate +  and subcapitate +
racemose +, paniculate +  and cymose-paniculate +
3 cm30 mm <br />0.03 m <br /> (35 cm350 mm <br />0.35 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
3 cm30 mm <br />0.03 m <br /> (30 cm300 mm <br />0.3 m <br />) +
connate +  and free +
0.1 cm1 mm <br />0.001 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
nonmembranous +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
erect to deflexed +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
tinged with red;pale-yellow;yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.5 cm5 mm <br />0.005 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Apr–Jun. +
homostylous +  and 3-carpellate +
Leafl. W. Bot. +
, +  and solid +
slender;stout +
persistent +
Endemic +  and Conservation concern +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
decumbent to erect +  and prostrate +
spreading +  and erect +
glabrous +, short-hispid +, villous +, hirsute +, floccose +  and tomentose +
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 viscidulum +
Eriogonum subg. Ganysma +
species +
emarginate +  and entire +
1/5 +  and 1/2 +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and perennial +
villous +, hirsute +, floccose +, tomentose +, hispid +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +