Eriogonum corymbosum var. revealianum

(S. L. Welsh) Reveal

Great Basin Naturalist 35: 362. 1976.

Common names: Bicknell wild buckwheat
Endemic
Basionym: Eriogonum revealianum S. L. Welsh Great Basin Naturalist 30: 17, fig. 2. 1970
Treatment appears in FNA Volume 5. Treatment on page 257. Mentioned on page 256.

Subshrubs, 3–6 × 2–7 dm. Leaves cauline 1/4 or less length of flowering-stem; petiole 0.5–1 (–1.5) cm; blade lanceolate to oblanceolate, 2–4.5 × 0.3–1 cm, densely tomentose abaxially, less so and greenish adaxially. Inflorescences 8–20 cm; branches floccose. Involucres 1.5–3.5 × 1–2 mm. Flowers 2–3.5 mm; perianth white to cream, glabrous.


Phenology: Flowering Jul–Sep.
Habitat: Gravelly to rocky clay slopes, sagebrush communities, pinyon-juniper and conifer woodlands
Elevation: 2100-2800 m

Discussion

Variety revealianum is known only from Utah (mainly Garfield, northern Kane, Piute and Sanpete counties), where it is encountered only infrequently. Elsewhere it is found in widely scattered disjunct populations on Bromley Ridge in the La Sal Mountains in northern San Juan County, and near the abandoned townsite of Rainbow in southeastern Uintah County. It is only marginally distinct from var. corymbosum. Some populations of E. lonchophyllum closely resemble var. revealianum, but that species always has glabrous inflorescences where such confusion might occur.

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

0.25 cm2.5 mm <br />0.0025 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
(S. L. Welsh) Reveal +
deciduous +  and persistent +
stipelike +
Eriogonum revealianum +
occasional +
papillate +
awn-tipped +  and simple +
3 cm30 mm <br />0.03 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
3 cm30 mm <br />0.03 m <br /> (3.5 cm35 mm <br />0.035 m <br />) +
2 cm20 mm <br />0.02 m <br /> (4.5 cm45 mm <br />0.045 m <br />) +
lanceolate;oblanceolate +
0.3 cm3 mm <br />0.003 m <br /> (1 cm10 mm <br />0.01 m <br />) +
not awn-tipped +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
glandular +, pubescent +  and glabrous +
triangular +  and scale-like +
1 cm10 mm <br />0.01 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not brittle +
spreading +  and erect +
scabrellous +
ridged +, angled +  and round +
spreading +  and erect +
whorled +, opposite +  and alternate +
Bicknell wild buckwheat +
2100-2800 m +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
unisexual +, , +  and bisexual +
not attenuate +
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 +
stout;slender +
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 to rocky clay slopes, sagebrush communities, pinyon-juniper and conifer woodlands +
reduced +
open +, umbellate +, capitate +  and cymose +
capitate +  and subcapitate +
1 cm10 mm <br />0.01 m <br /> (3 cm30 mm <br />0.03 m <br />) +
25 cm250 mm <br />0.25 m <br /> (30 cm300 mm <br />0.3 m <br />) +
3 cm30 mm <br />0.03 m <br /> (20 cm200 mm <br />0.2 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
8 cm80 mm <br />0.08 m <br /> (20 cm200 mm <br />0.2 m <br />) +
2 cm20 mm <br />0.02 m <br /> (25 cm250 mm <br />0.25 m <br />) +
connate +  and free +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
in whorls +, opposite +, alternate +  and rosulate +
persistent +
bractlike +
crenulate +
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 /> (1.5 cm15 mm <br />0.015 m <br />) +
tomentose +  and floccose +
0.5 cm5 mm <br />0.005 m <br /> (1 cm10 mm <br />0.01 m <br />) +
Flowering Jul–Sep. +
homostylous +  and 3-carpellate +
Great Basin Naturalist +
, +  and solid +
slender;stout +
persistent +
0.4 cm4 mm <br />0.004 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
included +  and slightly exserted +
0.1 cm1 mm <br />0.001 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
decumbent to erect +  and prostrate +
erect +  and spreading +
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 effusum subsp. corymbosum +
chambered +  and solid +
slender +  and stout +
Eriogonum corymbosum var. revealianum +
Eriogonum corymbosum +
variety +
emarginate +  and entire +
0 +  and 1/2 +
1/4 +  and 1/3 +
oblanceolate +  and spatulate +
coriaceous +
0.03 cm0.3 mm <br />3.0e-4 m <br /> (0.1 cm1 mm <br />0.001 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
greenish +  and grayish +
erect;spreading;erect;spreading +
reddish-brown-tomentose +  and floccose or glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +