Eriogonum thompsoniae var. albiflorum

Reveal

Madroño 19: 299. 1969.

Common names: Virgin wild buckwheat
Endemic
Synonyms: Eriogonum corymbosum var. albiflorum (Reveal) S. L. Welsh Eriogonum corymbosum var. matthewsiae Reveal Eriogonum thompsoniae var. matthewsiae (Reveal) Reveal
Treatment appears in FNA Volume 5. Treatment on page 261. Mentioned on page 262.

Plants 2–5 (–6) dm. Leaf-blade oblong to oblanceolate or elliptic, 2–5 × 0.8–2.5 cm, tomentose abaxially, margins plane. Involucres 2–3 mm. Perianths white.


Phenology: Flowering Jun–Oct.
Habitat: Sandy to gravelly, often volcanic flats and slopes, saltbush and blackbrush communities, pinyon-juniper and oak woodlands
Elevation: 900-1400 m

Discussion

Variety albiflorum is known only from scattered populations in Washington County, Utah, and in adjacent portions of Mohave County, Arizona.

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.

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 +
8 cm80 mm <br />0.08 m <br /> (10 cm100 mm <br />0.1 m <br />) +
2.5 cm25 mm <br />0.025 m <br /> (3 cm30 mm <br />0.03 m <br />) +
2 cm20 mm <br />0.02 m <br /> (8 cm80 mm <br />0.08 m <br />) +
glabrous +  and white-tomentose +
oblong;oblanceolate or elliptic +
0.2 cm2 mm <br />0.002 m <br /> (2.5 cm25 mm <br />0.025 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
0.5 cm5 mm <br />0.005 m <br /> (0.7 cm7 mm <br />0.007 m <br />) +
glandular +, pubescent +  and glabrous +
scale-like +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
not brittle +
spreading +  and erect +
scabrellous +
ridged +, angled +  and round +
whorled +, opposite +  and alternate +
Virgin wild buckwheat +
Ariz. +  and Utah. +
900-1400 m +
unisexual +, , +  and bisexual +
not attenuate +
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 +
Sandy to gravelly, often volcanic flats and slopes, saltbush and blackbrush communities, pinyon-juniper and oak woodlands +
reduced +
open +  and cymose +
capitate +  and subcapitate +
dense +  and diffuse +
10 cm100 mm <br />0.1 m <br /> (30 cm300 mm <br />0.3 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
10 cm100 mm <br />0.1 m <br /> (25 cm250 mm <br />0.25 m <br />) +
connate +  and free +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.2 cm2 mm <br />0.002 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
0.2 cm2 mm <br />0.002 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
nonmembranous +
0.1 cm1 mm <br />0.001 m <br /> (0.15 cm1.5 mm <br />0.0015 m <br />) +
2 cm20 mm <br />0.02 m <br /> (5 cm50 mm <br />0.05 m <br />) +
oblong +  and oblanceolate or elliptic +
0.8cm;2.5cm +
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 +
7 cm70 mm <br />0.07 m <br /> (10 cm100 mm <br />0.1 m <br />) +
tomentose +  and floccose or glabrous +
3 cm30 mm <br />0.03 m <br /> (7 cm70 mm <br />0.07 m <br />) +
Flowering Jun–Oct. +
homostylous +  and 3-carpellate +
, +  and solid +
slender;stout +
persistent +
0.35 cm3.5 mm <br />0.0035 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
0.3 cm3 mm <br />0.003 m <br /> (0.35 cm3.5 mm <br />0.0035 m <br />) +
decumbent to erect +  and prostrate +
glandular +, pubescent +  and glabrous +
0 cm0 mm <br />0 m <br /> (2 cm20 mm <br />0.02 m <br />) +
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 corymbosum var. albiflorum +, Eriogonum corymbosum var. matthewsiae +  and Eriogonum thompsoniae var. matthewsiae +
chambered +  and solid +
slender +  and stout +
Eriogonum thompsoniae var. albiflorum +
Eriogonum thompsoniae +
variety +
emarginate +  and entire +
0 +  and 1/2 +
oblong +  and obovate +
coriaceous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.05 cm0.5 mm <br />5.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +