Eriogonum exilifolium

Reveal

Great Basin Naturalist 27: 114, fig. 1. 1967.

Common names: Drop-leaf wild buckwheat
EndemicConservation concern
Treatment appears in FNA Volume 5. Treatment on page 263. Mentioned on page 241.

Herbs, matted, not scapose, 0.3–1 × 1–2 dm, glabrous, green. Stems spreading, usually with persistent leaf-bases, up to 1/5 height of plant; caudex stems matted; aerial flowering-stems mostly erect, slender, solid, not fistulose, 0.03–0.1 dm, glabrous or floccose or sparsely tomentose. Leaves basal, 1 per node but congested; petiole 0.5–1 cm, tomentose to floccose or glabrous; blade linear to linear-oblanceolate, (2–) 3–6 × 0.1–0.3 cm, densely white-tomentose abaxially, less so or glabrous and green adaxially, margins revolute. Inflorescences cymose-umbellate, 1.5–3 × 1.5–3 cm; branches dichotomous, glabrous; bracts 3, semileaflike, usually triangular, 3–5 mm. Peduncles stout, 0.1–0.4 cm, glabrous. Involucres 1 per node, turbinate-campanulate, 2.5–3.5 (–4.5) × 2–3 mm, glabrous except for cottony tomentum between teeth; teeth 5, erect, 0.3–0.5 mm. Flowers 2–3.5 mm; perianth white, glabrous; tepals connate proximal 1/4–1/3, monomorphic, oblanceolate to elliptic; stamens exserted, 3–4 mm; filaments sparsely pilose proximally. Achenes brown, 2.5–3.5 mm, glabrous.


Phenology: Flowering Jun–Sep.
Habitat: Clay hills and flats or granitic sandy slopes, mixed grassland and sagebrush communities
Elevation: 2200-2600 m

Discussion

Eriogonum exilifolium is known only from Grand, Jackson, and Larimer counties, Colorado, and from Carbon and Albany counties, Wyoming. The drop-leaf wild buckwheat is a “species of concern” in Wyoming.

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.

... more about "Eriogonum exilifolium"
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
James L. Reveal +
Reveal +
deciduous +  and persistent +
stipelike +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
2 cm20 mm <br />0.02 m <br /> (3 cm30 mm <br />0.03 m <br />) +
3 cm30 mm <br />0.03 m <br /> (6 cm60 mm <br />0.06 m <br />) +
glabrous +  and white-tomentose +
linear;linear-oblanceolate +
0.1cm;0.3cm +
not awn-tipped +
glandular +, pubescent +  and glabrous +
triangular +
not brittle +
spreading +  and erect +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Drop-leaf wild buckwheat +
Colo. +  and Wyo. +
2200-2600 m +
unisexual +, , +  and bisexual +
0.2 cm2 mm <br />0.002 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 hills and flats or granitic sandy slopes, mixed grassland and sagebrush communities +
reduced +
capitate +  and subcapitate +
dense +  and diffuse +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
turbinate-campanulate +
nonmembranous +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 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 +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
tomentose +  and floccose or glabrous +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Jun–Sep. +
homostylous +  and 3-carpellate +
Great Basin Naturalist +
, +  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 +
chambered +  and solid +
Slender (?) +  and Stout (?) +
Eriogonum exilifolium +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
0 +  and 1/2 +
1/4 +  and 1/3 +
oblanceolate +  and elliptic +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
herb +  and matted +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +