Eriogonum coloradense

Small

Bull. Torrey Bot. Club 33: 53. 1906.

Common names: Colorado wild buckwheat
EndemicConservation concern
Synonyms: Eriogonum multiceps var. coloradense (Small) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 263. Mentioned on page 241, 262.

Herbs, matted, scapose, (0.1–) 0.3–0.6 × 0.5–5 dm, glabrous, grayish. Stems spreading, often with persistent leaf-bases, up to 1/5 height of plant; caudex stems matted, glabrous; aerial flowering-stems erect, slender, solid, not fistulose, 0.3–1 (–1.2) dm, glabrous. Leaves basal, 1 per node but congested; petiole (0.2–) 0.5–3 cm, tomentose to floccose or glabrous; blade oblanceolate to lanceolate or narrowly spatulate, 1–4 (–5) × 0.3–0.6 (–0.9) cm, densely white-tomentose abaxially, thinly floccose or glabrous and green adaxially, margins plane or thickened. Inflorescences capitate, 0.7–1.5 cm wide; branches absent; bracts 3, semileaflike, usually triangular, 1.5–3 (–4) mm. Peduncles absent. Involucres 3–4 per cluster, turbinate-campanulate, 2–3.5 × 1.5–2.5 (–3) mm, glabrous except for cottony tomentum on teeth, rarely thinly floccose; teeth 5, erect, 0.3–0.7 (–1) mm. Flowers 2.5–3.5 (–4) mm; perianth white to rose, glabrous; tepals connate proximal 1/4, monomorphic, oblong to ovate; stamens exserted, 3.5–4 mm; filaments sparsely pilose proximally. Achenes light-brown to brown, 2.5–3.5 mm, glabrous.


Phenology: Flowering Jul–Sep.
Habitat: Sandy to gravelly flats and slopes, high-elevation sagebrush and marginal meadow grassland communities, montane or subalpine conifer woodlands
Elevation: 2800-3900 m

Discussion

Of conservation concern.

Eriogonum coloradense is a high-elevation species closely allied to E. lonchophyllum. It is restricted to the backbone of the central Colorado Rocky Mountains in Chaffee, Gunnison, Park, Pitkin, and Saguache counties. The Colorado wild buckwheat is listed as a “sensitive” species for Colorado. It is occasionally seen in cultivation.

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 coloradense"
light-brown;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 +
4 cm40 mm <br />0.04 m <br /> (5 cm50 mm <br />0.05 m <br />) +
0.6 cm6 mm <br />0.006 m <br /> (0.9 cm9 mm <br />0.009 m <br />) +
1 cm10 mm <br />0.01 m <br /> (4 cm40 mm <br />0.04 m <br />) +
glabrous +, floccose +  and white-tomentose +
oblanceolate;lanceolate or narrowly spatulate +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
not awn-tipped +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
glandular +, pubescent +  and glabrous +
triangular +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
grooved +, branched +  and open +
not brittle +
spreading +  and erect +
tomentose +  and floccose or glabrous occasionally lanate or glandular +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Colorado wild buckwheat +
2800-3900 m +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
unisexual +, , +  and bisexual +
not attenuate +
0.25 cm2.5 mm <br />0.0025 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 gravelly flats and slopes, high-elevation sagebrush and marginal meadow grassland communities, montane or subalpine conifer woodlands +
reduced +
open +, virgate +, umbellate +, cymose-umbellate +  and cymose +
dense +  and diffuse +
cymelike +, paniclelike +, racemelike +  and spikelike +
0.7 cm7 mm <br />0.007 m <br /> (1.5 cm15 mm <br />0.015 m <br />) +
connate +  and free +
narrowly turbinate +  and campanulate +
nonmembranous +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
tomentose +  and floccose or glabrous +
0.5 cm5 mm <br />0.005 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Jul–Sep. +
homostylous +  and 3-carpellate +
Bull. Torrey Bot. Club +
, +  and solid +
slender;stout +
persistent +
Endemic +  and Conservation concern +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 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 +
Eriogonum multiceps var. coloradense +
chambered +  and solid +
slender +  and stout +
Eriogonum coloradense +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
0 +  and 1/2 +
oblong +  and ovate +
coriaceous +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
cottony +  and glabrous +
turbinate-campanulate +
1.5mm;2.5mm +
0.07 cm0.7 mm <br />7.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
herb +  and matted +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +