Eriogonum deflexum var. deflexum

Common names: Flat-topped skeleton weed
Illustrated
Synonyms: Eriogonum deflexum var. turbinatum Reveal Eriogonum deflexum subsp. insigne (S. Watson) S. Stokes Eriogonum deflexum var. rectum Eriogonum insigne
Treatment appears in FNA Volume 5. Treatment on page 395. Mentioned on page 398.

Plants (0.5–) 1–5 (–20) dm. Flowering-stems not fistulose. Inflorescences flat-topped, spreading, hemispheric, rarely narrowly erect and strict with whiplike branches. Peduncles absent or deflexed, rarely some ± erect distally, (0.1–) 0.2–0.5 cm. Involucres turbinate, 1.5–2.5 mm. Flowers 1–2 mm; outer tepals cordate to ovate. 2n = 40.


Phenology: Flowering year-round.
Habitat: Sandy to gravelly washes, flats, and slopes, saltbush, creosote bush, greasewood, blackbrush, sagebrush, and mesquite communities, pinyon-juniper woodlands
Elevation: -50-1900(-2000) m

Distribution

V5 811-distribution-map.gif

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

Discussion

Variety deflexum is widespread and variable, found mainly in the Mojave and Sonoran deserts of southeastern California, southern Nevada, Arizona, and New Mexico, southward into northern Baja California Norte and northwestern Sonora, Mexico. Plants in southern Arizona tend to have slightly longer peduncles (3–5 mm) and involucres (2–2.5 mm) than do those to the north and west (peduncles 0.1–3 mm, involucres 1.5–2 mm); the former have been recognized as var. turbinatum. Variety deflexum occurs also in the colder Great Basin desert in southwestern Utah, where a sharp distinction between it and var. nevadense is not always possible.

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.

0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
brown;dark-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Torrey in J. C. Ives +
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 />) +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
grayish +  and greenish +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
subglabrous +, floccose +  and white-tomentose +
cordate;reniform or nearly orbiculate +
2 cm20 mm <br />0.02 m <br /> (4 cm40 mm <br />0.04 m <br />) +
not awn-tipped +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
grooved +, disarticulating +  and dichotomous +
not brittle +
glaucous +  and glabrous +
scabrellous +
whip-like +
spreading +  and erect +
whorled +, opposite +  and alternate +
Flat-topped skeleton weed +
Ariz. +, Calif. +, Nev. +, N.Mex. +, Utah +, Mexico (Baja California) +  and Mexico (Sonora) +
-50-1900(-2000) m +
pilose +  and glabrous +
unisexual +, , +  and bisexual +
not attenuate +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
hollow +  and solid +
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 to gravelly washes, flats, and slopes, saltbush, creosote bush, greasewood, blackbrush, sagebrush, and mesquite communities, pinyon-juniper woodlands +
open +  and cymose +
capitate +  and subcapitate +
racemose +, paniculate +  and cymose-paniculate +
90 cm900 mm <br />0.9 m <br /> (180 cm1,800 mm <br />1.8 m <br />) +
10 cm100 mm <br />0.1 m <br /> (90 cm900 mm <br />0.9 m <br />) +
erect +  and spreading +
hemispheric +  and flat-topped +
5 cm50 mm <br />0.05 m <br /> (50 cm500 mm <br />0.5 m <br />) +
connate +  and free +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
marcescent +
persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
greenish +  and reddish +
not swollen +
orthotropous +
accrescent +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
erect;deflexed +
erect to deflexed +
filiform;capillary +
slender +  and stout +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
pinkish;reddish +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
1 cm10 mm <br />0.01 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Flowering year-round. +
homostylous +  and 3-carpellate +
in J. C. Ives, Rep. Colorado R. +
, +  and solid +
slender;stout +
persistent +
Illustrated +
0.1 cm1 mm <br />0.001 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 deflexum var. turbinatum +, Eriogonum deflexum subsp. insigne +, Eriogonum deflexum var. rectum +  and Eriogonum insigne +
chambered +  and solid +
slender +  and stout +
Eriogonum deflexum var. deflexum +
Eriogonum deflexum +
variety +
emarginate +  and entire +
1/5 +  and 1/2 +
lobed +  and laciniate +
coriaceous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
annual +  and perennial +
greenish +  and grayish +
glaucous +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +