Eriogonum eremicum

Reveal

Phytologia 23: 165. 1972.

Common names: Limestone wild buckwheat
Endemic
Synonyms: Eriogonum batemanii var. eremicum (Reveal) S. L. Welsh
Treatment appears in FNA Volume 5. Treatment on page 272. Mentioned on page 236.

Herbs, spreading, not scapose, 2.5–4.5 × 1–2.5 dm, glabrous, grayish. Stems spreading, without persistent leaf-bases, up to 1/4 height of plant; caudex stems absent; aerial flowering-stems erect, slender, solid, not fistulose, 0.5–2 dm, glabrous, pubescent among leaves. Leaves basal, 1 per node; petiole 1–2.5 cm, tomentose; blade ovate to round, 1.2–2 (–2.5) × 1–1.7 (–2) cm, tomentose on both surfaces, margins plane. Inflorescences cymose, 1.2–2.5 × 1–2 dm; branches dichotomous, glabrous; bracts 3, scalelike, triangular, 1–3 mm. Peduncles absent. Involucres (1–) 2–5 per cluster, turbinate, 2.5–4 (–4.5) × 2–2.5 mm, glabrous; teeth 5, erect, 0.4–0.8 mm. Flowers 2.5–3 mm; perianth white, glabrous; tepals connate proximal 1/5, monomorphic, obovate; stamens exserted, 2.5–3.5 mm; filaments pilose proximally. Achenes light-brown to brown, 2.5–3 mm, glabrous.


Phenology: Flowering Jun–Sep.
Habitat: Gravelly dolomite flats, saltbush communities, pinyon-juniper woodlands
Elevation: 1600-2100 m

Discussion

Of conservation concern.

Eriogonum eremicum is the dolomitic counterpart to the silty-clay species E. batemanii of eastern Utah and western Colorado. The limestone wild buckwheat is known from a small area in southwestern Millard County and adjacent northern Beaver County of western Utah.

Selected References

None.

Lower Taxa

None.

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... more about "Eriogonum eremicum"
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 +
Reveal +
deciduous +  and persistent +
stipelike +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
2 cm20 mm <br />0.02 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
1.7 cm17 mm <br />0.017 m <br /> (2 cm20 mm <br />0.02 m <br />) +
1.2 cm12 mm <br />0.012 m <br /> (2 cm20 mm <br />0.02 m <br />) +
ovate;round +
1 cm10 mm <br />0.01 m <br /> (1.7 cm17 mm <br />0.017 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
glandular +, pubescent +  and glabrous +
triangular +  and scale-like +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not brittle +
spreading +  and erect +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Limestone wild buckwheat +
1600-2100 m +
unisexual +, , +  and bisexual +
not attenuate +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 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 +
Gravelly dolomite flats, saltbush communities, pinyon-juniper woodlands +
reduced +
capitate +  and subcapitate +
dense +  and diffuse +
cymelike +, paniclelike +, racemelike +  and spikelike +
connate +  and free +
0.4 cm4 mm <br />0.004 m <br /> (0.45 cm4.5 mm <br />0.0045 m <br />) +
0.25 cm2.5 mm <br />0.0025 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
nonmembranous +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 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 +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
Flowering Jun–Sep. +
homostylous +  and 3-carpellate +
, +  and solid +
slender;stout +
persistent +
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 +
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 batemanii var. eremicum +
chambered +  and solid +
slender +  and stout +
Eriogonum eremicum +
Eriogonum subg. Eucycla +
species +
emarginate +  and entire +
0 +  and 1/2 +
obovate +
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 +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +