Eriogonum clavatum

Small

Bull. Torrey Bot. Club 25: 50. 1898.

Common names: Hoover’s desert trumpet
Synonyms: Eriogonum trichopes var. hooveri Reveal
Treatment appears in FNA Volume 5. Treatment on page 387. Mentioned on page 383.

Herbs, erect, annual, (2–) 4–18 (–22) dm, glabrous, bright green. Stems: caudex absent; aerial flowering-stems erect, hollow and fistulose, 0.5–3.5 (–5) dm, glabrous, minutely glandular proximally, infrequently also short-hispid. Leaves basal; petiole 1–6 cm, hirsute; blade round to reniform, (0.5–) 1–2.5 (–4) × (0.5–) 1–2 (–3) cm, short-hirsute on both surfaces and greenish, margins plane. Inflorescences cymose, open, spreading to erect, 30–150 (–170) × 10–80 cm; branches usually fistulose, glabrous; bracts 3, scalelike, 1–4 × 1–2 mm. Peduncles mostly spreading, straight, slightly bent distally, capillary, 1–4 cm, glabrous. Involucres turbinate, 1–1.5 (–1.8) × 0.6–0.9 (–1.2) mm, glabrous; teeth 4, erect, 0.3–0.5 mm. Flowers 1.5–2.5 mm; perianth yellow with greenish to reddish midribs, densely hirsute with coarse curved hairs; tepals monomorphic, narrowly ovate; stamens exserted, 0.9–1.5 mm; filaments glabrous or sparsely pubescent proximally. Achenes light-brown to brown, 3-gonous, 2–2.5 mm, glabrous. 2n = 32.


Phenology: Flowering year-round.
Habitat: Clayey flats and slopes, mixed grassland, chaparral, saltbush, and sagebrush communities, oak and montane conifer woodlands
Elevation: 400-1100 m

Distribution

V5 792-distribution-map.gif

Calif., Nev., Mexico (Baja California)

Discussion

Eriogonum clavatum is the tall, slender member of the E. inflatum complex found on the Inner Coast, Peninsular, and Transverse ranges of southern California. It is rather common from Monterey and San Benito counties southward to Ventura, northwestern Los Angeles, and extreme southwestern Kern counties, and then disjunct in the Peninsular Ranges of Riverside and San Diego counties, where it just enters north-central Baja California, Mexico. It extends eastward onto desert ranges, where it rarely exceeds 6 dm in height, from southern Mono County and Inyo County south through western San Bernardino County to northwestern Riverside County. From Inyo County, the species occurs across southern Nye and northern Clark counties into western Lincoln 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.

... more about "Eriogonum clavatum"
light-brown;brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
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 +
round;reniform +
1cm;2cm +
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 +
Hoover’s desert trumpet +
Calif. +, Nev. +  and Mexico (Baja California) +
400-1100 m +
pubescent +  and glabrous +
unisexual +, , +  and bisexual +
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 +
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 flats and slopes, mixed grassland, chaparral, saltbush, and sagebrush communities, oak and montane conifer woodlands +
open +  and cymose +
capitate +  and subcapitate +
racemose +, paniculate +  and cymose-paniculate +
150 cm1,500 mm <br />1.5 m <br /> (170 cm1,700 mm <br />1.7 m <br />) +
spreading +  and erect +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.18 cm1.8 mm <br />0.0018 m <br />) +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.12 cm1.2 mm <br />0.0012 m <br />) +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 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;bent +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
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 +
Bull. Torrey Bot. Club +
, +  and solid +
slender;stout +
persistent +
decumbent to erect +  and prostrate +
spreading +  and erect +
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 +
Eriogonum trichopes var. hooveri +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum clavatum +
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 +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +