Eriogonum brandegeei

Rydberg

Fl. Rocky Mts., 220, 1061. 1917.

Common names: Brandegee’s wild buckwheat
EndemicConservation concern
Synonyms: Eriogonum spathulatum var. brandegeei (Rydberg) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 269. Mentioned on page 241, 264.

Herbs, spreading, sometimes scapose, 1–2.5 × (0.5–) 1–2 dm, tomentose to floccose, grayish. Stems spreading, with persistent leaf-bases, up to 1/4 height of plant; caudex stems matted, floccose or glabrous; aerial flowering-stems erect, slender, solid, not fistulose, 1–2.5 dm, tomentose to floccose. Leaves strictly basal, 1 per node; petiole 1–3 (–3.5) cm, lanate; blade oblanceolate to elliptic, 1.5–4 (–5) × 0.4–1.2 (–1.6) cm, densely white-tomentose adaxially, less so and greenish adaxially, margins plane. Inflorescences capitate or umbellate-cymose, 0.1–1.5 cm wide, tomentose to floccose; branches dichotomous, sometimes absent, tomentose to floccose; bracts 3, scalelike, triangular, and 2–5 mm, or leaflike, lanceolate, and 1–3 × 0.2–0.7 cm. Peduncles absent. Involucres 4–8 per cluster, turbinate, 3.5–5 × 3–4 mm, floccose or glabrous; teeth 5, erect, 0.4–0.8 mm. Flowers (2.5–) 3–3.5 mm; perianth ochroleucous, glabrous; tepals connate proximal 1/4, monomorphic, oblanceolate to oblong; stamens exserted, 3–3.5 mm; filaments pilose basally. Achenes light-brown, 3–3.5 mm, glabrous.


Phenology: Flowering Jul–Oct.
Habitat: Clay slopes and washes, sagebrush communities, juniper woodlands
Elevation: 1800-2600 m

Discussion

Of conservation concern.

Eriogonum brandegeei is a rare and localized species known from nine occurrences along the Arkansas River in Chaffee and Fremont counties. It is regarded as a “sensitive” species in Colorado, by both the state and the U.S. Forest Service. The Droney Gulch Natural Area has been established, in part, to protect the species. Brandegee’s wild buckwheat is related to E. brevicaule var. laxifolium, but well isolated from that taxon. An undated E. L. Greene specimen (ISC) supposedly was gathered in northern New Mexico, but that is most unlikely. A G. W. Letterman collection (MO) purportedly from Colorado Springs certainly is mislabeled.

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.

... more about "Eriogonum brandegeei"
light-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Rydberg +
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 />) +
1.2 cm12 mm <br />0.012 m <br /> (1.6 cm16 mm <br />0.016 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
white-tomentose +
oblanceolate;elliptic +
0.4cm;1.2cm +
not awn-tipped +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
glandular +, pubescent +  and glabrous +
lanceolate +, triangular +  and scale-like +
0.2 cm2 mm <br />0.002 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
not brittle +
spreading +  and erect +
tomentose +  and floccose +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
glabrous +  and floccose +
whorled +, opposite +  and alternate +
Brandegee’s wild buckwheat +
1800-2600 m +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
unisexual +, , +  and bisexual +
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 +
Clay slopes and washes, sagebrush communities, juniper woodlands +
reduced +
umbellate-cymose +  and capitate +
capitate +  and subcapitate +
dense +  and diffuse +
tomentose +  and floccose +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
glabrous +  and floccose +
nonmembranous +
0.3 cm3 mm <br />0.003 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
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 +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
Flowering Jul–Oct. +
homostylous +  and 3-carpellate +
Fl. Rocky Mts., +
, +  and solid +
slender;stout +
persistent +
Endemic +  and Conservation concern +
decumbent to erect +  and prostrate +
penicillate +, fimbriate +  and capitate +
deciduous +  and persistent +
? (?) +  and ? (?) +
coriaceous +  and membranous +
consisting of a series +  and tubular +
distinct +
erect;spreading or recurved +
Eriogonum spathulatum var. brandegeei +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum brandegeei +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
0 +  and 1/2 +
oblanceolate +  and oblong +
coriaceous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.08 cm0.8 mm <br />8.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
tomentose +  and floccose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +