Eriogonum trichopes

Torrey in W. H. Emory

in W. H. Emory, Not. Milit. Reconn., 150. 1848.

Common names: Little desert trumpet
Synonyms: Eriogonum trichopes subsp. minus (Bentham) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 387. Mentioned on page 384, 388, 389, 431.

Herbs, spreading to somewhat erect, annual, 1–4.5 (–6) dm, glabrous and often glaucous, yellow-green. Stems: caudex absent; aerial flowering-stems erect, occasionally hollow and fistulose, 0.5–2 (–3) dm, glabrous, minutely hirsute or short-hispid proximally. Leaves basal; petiole 1–6 cm, hirsute; blade broadly oblong, (0.5–) 1–2.5 (–4) × (0.5–) 1–2 (–3) cm, short-hirsute on both surfaces and greenish, margins wavy. Inflorescences cymose, open to dense, usually spreading, 5–30 × 5–50 cm; branches usually not fistulose, glabrous; bracts 3, scalelike, 1–4 × 1–2 mm. Peduncles mostly erect, straight, capillary, 0.5–1.5 cm, glabrous. Involucres turbinate, 0.7–1 × 0.6–0.9 mm, glabrous; teeth 4 (–5), erect, 0.3–0.4 mm. Flowers 1–2 mm; perianth yellow to greenish yellow with greenish to reddish midribs, densely hirsute with coarse curved hairs; tepals monomorphic, narrowly ovate; stamens exserted, 0.9–1.5 mm; filaments sparsely pubescent proximally. Achenes light-brown to brown, lenticular to 3-gonous, 1–1.5 mm, glabrous.


Phenology: Flowering year-round.
Habitat: Clayey, sandy to gravelly flats, washes, and slopes, mixed grassland, saltbush, creosote bush, blackbrush, and mesquite communities, pinyon and/or juniper woodlands
Elevation: -60-1500(-1900) m

Distribution

V5 793-distribution-map.gif

Ariz., Calif., Nev., N.Mex., Utah, Mexico (Baja California), Mexico (Chihuahua), Mexico (Sonora)

Discussion

Eriogonum trichopes is common on the Sonoran Desert and the southern portion of the Mojave Desert from southern California (Imperial, Inyo, Riverside, San Bernardino, and San Diego counties), eastward across southern Nevada (Clark, Lincoln, and Nye counties), southwestern Utah (Washington County), and Arizona (Coconino, Cochise, Gila, Graham, La Paz, Maricopa, Mohave, Pima, Pinal, Santa Cruz, Yavapai, and Yuma counties) to southern New Mexico (Cibola, Dona Ana, Grant, Hidalgo, Luna, Otero, and Valencia counties). It is also found to the south in northern Mexico (Baja California Norte, Sonora, and Chihuahua). Two related species occur in Baja California, the perennial E. scalare and the annual E. intricatum. Unlike E. trichopes, which occasionally has inflated stems, neither of those Mexican species exhibits that trait.

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.

... more about "Eriogonum trichopes"
light-brown;brown +
included +  and exserted +
lenticular +  and 3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Torrey in W. H. Emory +
deciduous +  and persistent +
stipelike +
Eriogonum sect. Ganysma +
awn-tipped +  and simple +
2.5 cm25 mm <br />0.025 m <br /> (4 cm40 mm <br />0.04 m <br />) +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
short-hirsute +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not awn-tipped +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 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 +
scabrellous +
fistulose +
spreading +  and erect +
whorled +, opposite +  and alternate +
Little desert trumpet +
Ariz. +, Calif. +, Nev. +, N.Mex. +, Utah +, Mexico (Baja California) +, Mexico (Chihuahua) +  and Mexico (Sonora) +
-60-1500(-1900) m +
unisexual +, , +  and bisexual +
not attenuate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
decumbent to erect +  and prostrate +
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 +
Clayey, sandy to gravelly flats, washes, and slopes, mixed grassland, saltbush, creosote bush, blackbrush, and mesquite communities, pinyon and/or juniper woodlands +
open +  and cymose +
capitate +  and subcapitate +
racemose +, paniculate +  and cymose-paniculate +
5 cm50 mm <br />0.05 m <br /> (30 cm300 mm <br />0.3 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +
connate +  and free +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
nonmembranous +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
bractlike +
pubescent +  and glabrous +
greenish +  and reddish +
not swollen +
orthotropous +
accrescent +
erect to deflexed +
capillary +
0.5 cm5 mm <br />0.005 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
yellow;greenish yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
1 cm10 mm <br />0.01 m <br /> (6 cm60 mm <br />0.06 m <br />) +
Flowering year-round. +
homostylous +  and 3-carpellate +
in W. H. Emory, Not. Milit. Reconn., +
, +  and solid +
slender;stout +
persistent +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 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 +
Eriogonum trichopes subsp. minus +
chambered +  and solid +
slender +  and stout +
Eriogonum trichopes +
Eriogonum subg. Ganysma +
species +
emarginate +  and entire +
1/5 +  and 1/2 +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.04 cm0.4 mm <br />4.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and perennial +
erect;spreading to somewhat +
glaucous +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +