Eriogonum clavellatum

Small

Bull. Torrey Bot. Club 25: 48. 1898.

Common names: Comb Wash wild buckwheat
EndemicConservation concern
Treatment appears in FNA Volume 5. Treatment on page 252. Mentioned on page 231, 238, 240, 253.

Subshrubs, spreading, not scapose, 1–2.5 × 3–8 dm, thinly floccose or glabrous, greenish to grayish. Stems spreading, without persistent leaf-bases, up to 1/3 height of plant; caudex stems compact; aerial flowering-stems spreading to erect, slender, solid, not fistulose, 0.06–0.2 (–2.5) dm, thinly floccose or glabrous. Leaves cauline, 1 per node or fasciculate; petiole 0.05–0.1 cm, tomentose to floccose, rarely glabrous; blade oblanceolate, 1–1.5 (–2) × 0.08–0.2 cm, densely white-tomentose abaxially, thinly tomentose and grayish or rarely glabrous and green adaxially, margins tightly revolute. Inflorescences umbellate to cymose, compact, 0.5–2 × 1–2 cm; branches dichotomous, thinly floccose or glabrous; bracts 3, scalelike, triangular, 1.5–2.5 (–3) mm. Peduncles erect, 0.15–0.8 cm, glabrous. Involucres 1 per node, turbinate-campanulate, (3–) 3.5–4.5 (–5) × 2.5–4.5 mm, glabrous; teeth 5, erect, 0.6–0.9 (–1.1) mm. Flowers (2.5–) 3–3.5 mm; perianth white, glabrous; tepals connate proximal 1/4–1/3, dimorphic, those of outer whorl broadly obovate to nearly fan-shaped, 2–2.5 mm wide, those of inner whorl slightly shorter and oblanceolate to spatulate, 0.9–1.5 mm wide; stamens long-exserted, 3–6 mm; filaments sparsely pilose proximally. Achenes light-brown, 3–3.5 mm, glabrous.


Phenology: Flowering May–Jul.
Habitat: Sandy to heavy clay washes and slopes, saltbush communities
Elevation: 1300-1800 m

Discussion

Of conservation concern.

Eriogonum clavellatum is relatively rare, known only from a few sites in the Four Corners area of San Juan County, Utah, Montezuma County, Colorado, and San Juan County, New Mexico. It has yet to be found in Arizona. The Comb Wash wild buckwheat is considered a “sensitive” species by the Bureau of Land Management throughout its range.

Selected References

None.

Lower Taxa

None.

"/2" 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."dm" is not declared as a valid unit of measurement for this property.

... more about "Eriogonum clavellatum"
light-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
deciduous +  and persistent +
stipelike +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
1.5 cm15 mm <br />0.015 m <br /> (2 cm20 mm <br />0.02 m <br />) +
green +  and grayish +
1 cm10 mm <br />0.01 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
glabrous +, tomentose +  and white-tomentose +
oblanceolate +
0.08 cm0.8 mm <br />8.0e-4 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
glandular +, pubescent +  and glabrous +
triangular +  and scale-like +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
not brittle +
spreading +  and erect +
glabrous +  and floccose +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Comb Wash wild buckwheat +
Colo. +, N.Mex. +  and Utah. +
1300-1800 m +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
unisexual +, , +  and bisexual +
not attenuate +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
decumbent to erect +  and prostrate +
not fistulose +
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 heavy clay washes and slopes, saltbush communities +
reduced +
umbellate +  and cymose +
capitate +  and subcapitate +
dense +  and diffuse +
0.5 cm5 mm <br />0.005 m <br /> (2 cm20 mm <br />0.02 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
1 cm10 mm <br />0.01 m <br /> (2 cm20 mm <br />0.02 m <br />) +
connate +  and free +
0.45 cm4.5 mm <br />0.0045 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
turbinate-campanulate +
nonmembranous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
lobed +, undulate +, crisped +, crenulate +  and entire +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.8 cm8 mm <br />0.008 m <br />) +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
glabrous +, tomentose +  and floccose +
0.05 cm0.5 mm <br />5.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
Flowering May–Jul. +
homostylous +  and 3-carpellate +
Bull. Torrey Bot. Club +
, +  and solid +
slender;stout +
persistent +
Endemic +  and Conservation concern +
long-exserted +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
decumbent to erect +  and prostrate +
glandular +, pubescent +  and glabrous +
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 clavellatum +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
in proximal 1/2 +  and connate +
0 +  and 1/2 +
lobed +  and laciniate +
coriaceous +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.11 cm1.1 mm <br />0.0011 m <br />) +
0.06 cm0.6 mm <br />6.0e-4 m <br /> (0.09 cm0.9 mm <br />9.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
greenish +  and grayish +
glabrous +  and floccose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +
0.09 cm0.9 mm <br />9.0e-4 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +