Stenogonum flexum

(M. E. Jones) Reveal & J. T. Howell

Brittonia 28: 249. 1976.

Common names: Bent two-whorl buckwheat
Endemic
Basionym: Eriogonum flexum M. E. Jones Zoë 2: 15. 1891
Treatment appears in FNA Volume 5. Treatment on page 432. Mentioned on page 431.

Stems mostly erect, (0.5–) 1–3 dm, sparsely glandular. Leaves basal; petiole 1–4 cm; blade mostly orbiculate, 0.5–2 cm, minutely strigose when young, glabrous at maturity. Inflorescences erect or slightly spreading, 0.5–2.5 dm, glandular at nodes and proximal internode; bracts 0.5–2 mm, sometimes sparsely glandular. Peduncles flexed, filiform, 1–3 cm, glandular to middle. Involucral-bracts 2–3 × 2–4 mm, glabrous, sometimes sparsely glandular. Flowers: perianth yellow to reddish yellow, 1.5–3.5 mm; tepals lanceolate; filaments 1.5–2 mm; anthers 0.2–0.3 mm. Achenes 2–2.5 mm. 2n = 40.


Phenology: Flowering Apr–Sep.
Habitat: Clay hills and flats, saltbush communities
Elevation: 1300-2000 m

Distribution

V5 900-distribution-map.gif

Ariz., Colo., N.Mex., Utah.

Discussion

Stenogonum flexum is found in eastern Utah from Uintah County south to Kane and San Juan counties, with additional populations over the state lines in Arizona, Colorado, and New Mexico.

Selected References

None.

Lower Taxa

None.

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... more about "Stenogonum flexum"
light-brown +
3-gonous +
0.02 cm0.2 mm <br />2.0e-4 m <br /> (0.03 cm0.3 mm <br />3.0e-4 m <br />) +
James L. Reveal +
(M. E. Jones) Reveal & J. T. Howell +
stipelike +
Eriogonum flexum +
awn-tipped +  and simple +
glabrous +  and strigose +
orbiculate +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
not awn-tipped +
glandular +  and glabrous +
triangular +  and scale-like +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
disarticulating +  and dichotomous +
not brittle +
glabrous +, glandular +  and strigose +
just below the soil surface or and above the soil surface +  and spreading +
Bent two-whorl buckwheat +
Ariz. +, Colo. +, N.Mex. +  and Utah. +
1300-2000 m +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unisexual +  and bisexual +
disarticulating +  and solid +
decumbent to erect +  and prostrate +
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 +
Clay hills and flats, saltbush communities +
spreading +  and erect +
cymelike +, paniclelike +, racemelike +  and spikelike +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
urceolate +, campanulate +, turbinate +, prismatic +  and cylindric +
nonmembranous +
alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
erect to deflexed +
filiform;flexed +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
yellow;reddish yellow +
urceolate +  and campanulate +
accrescent +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
Flowering Apr–Sep. +
homostylous +  and 3-carpellate +
, +  and solid +
slender;stout +
disarticulating +  and solid +
decumbent to spreading or erect +  and prostrate +
glandular +, strigose +  and glabrous +
not fistulose +
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 sect. Stenogonum +
chambered +, , +  and solid +
Stenogonum flexum +
Stenogonum +
species +
lanceolate +
coriaceous +
persistent +
membranous +
pubescent +  and glabrous +
3 +  and 2 +