Eriogonum leptocladon var. leptocladon

Common names: Sand wild buckwheat
Endemic
Synonyms: Eriogonum effusum var. shandsii
Treatment appears in FNA Volume 5. Treatment on page 250. Mentioned on page 249.

Plants 4–12 × 5–20 dm. Aerial flowering-stems floccose to glabrate. Leaves: blade linear-lanceolate to linear-oblanceolate, 1.5–4 × 0.2–0.4 cm, margins plane. Inflorescence branches thinly floccose to glabrate, rarely white-tomentose. Perianths pale-yellow to yellow.


Phenology: Flowering Jun–Oct.
Habitat: White or red blow sand on flats, washes and slopes, mixed grassland, saltbush, ephedra, and sagebrush communities, pinyon-juniper woodlands
Elevation: 1100-1900 m

Discussion

Variety leptocladon is much more common in Utah’s Emery, Garfield, Grand, and Wayne counties than is either of the other two varieties. It also occurs in San Juan County, but there it is restricted to portions of Canyonlands National Park, and is just inside the eastern edge of Sevier County. It is encountered also, albeit rarely, in Navajo County, Arizona. Variety leptocladon is worthy of cultivation, especially those expressions with densely white-tomentose inflorescence branches such as found in the Dolores Triangle area north of Ryan Creek in Grand County (e.g., Atwood & Welsh 23213, BRY).

Selected References

None.

Lower Taxa

None.

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light-brown +
included +  and exserted +
3-gonous +
usually red +  and cream or yellow +
oblong +  and ellipsoid or oval +
acute;obtuse or rounded +
James L. Reveal +
Torrey & A. Gray in War Department [U.S.] +
deciduous +  and persistent +
stipelike +
Undefined subg. Eucycla +
papillate +
awn-tipped +  and simple +
0.8 cm8 mm <br />0.008 m <br /> (1.2 cm12 mm <br />0.012 m <br />) +
1.5 cm15 mm <br />0.015 m <br /> (4 cm40 mm <br />0.04 m <br />) +
white-tomentose +
linear-lanceolate;linear-oblanceolate +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 m <br />) +
not awn-tipped +
leaflike +  and semileaflike +
0.3 cm3 mm <br />0.003 m <br /> (0.6 cm6 mm <br />0.006 m <br />) +
glandular +, pubescent +  and glabrous +
linear +  and triangular +
0.1 cm1 mm <br />0.001 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
not brittle +
spreading +  and erect +
glabrous +, tomentose +  and floccose or glabrate +
scabrellous +
ridged +, angled +  and round +
whorled +, opposite +  and alternate +
Sand wild buckwheat +
Ariz. +  and Utah. +
1100-1900 m +
0.2 cm2 mm <br />0.002 m <br /> (0.25 cm2.5 mm <br />0.0025 m <br />) +
unisexual +, , +  and bisexual +
not attenuate +
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 +
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 +
White or red blow sand on flats, washes and slopes, mixed grassland, saltbush, ephedra, and sagebrush communities, pinyon-juniper woodlands +
reduced +
open +  and cymose +
capitate +  and subcapitate +
white-tomentose +, thinly floccose +  and glabrate +
dense +  and diffuse +
5 cm50 mm <br />0.05 m <br /> (40 cm400 mm <br />0.4 m <br />) +
cymelike +, paniclelike +, racemelike +  and spikelike +
10 cm100 mm <br />0.1 m <br /> (50 cm500 mm <br />0.5 m <br />) +
connate +  and free +
0.15 cm1.5 mm <br />0.0015 m <br /> (0.3 cm3 mm <br />0.003 m <br />) +
tomentose +  and floccose or glabrous +
turbinate +  and turbinate-campanulate +
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 +
pubescent +  and glabrous +
not swollen +
orthotropous +
accrescent +
curved +  and straight +
erect to deflexed +
pale-yellow;yellow +
cylindric +  and urceolate +
accrescent +
fleshy +, indurate +  and membranous +
with extrafloral nectaries +  and not articulate +
tomentose +  and floccose +
0.2 cm2 mm <br />0.002 m <br /> (0.5 cm5 mm <br />0.005 m <br />) +
Flowering Jun–Oct. +
homostylous +  and 3-carpellate +
in War Department [U.S.], Pacif. Railr. Rep. +
, +  and solid +
slender;stout +
persistent +
0.2 cm2 mm <br />0.002 m <br /> (0.4 cm4 mm <br />0.004 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 effusum var. shandsii +
chambered +  and solid +
slender +  and stout +
Eriogonum leptocladon var. leptocladon +
Eriogonum leptocladon +
variety +
emarginate +  and entire +
0 +  and 1/2 +
1/4 +  and 1/3 +
oblong +  and broadly obovate +
coriaceous +
0.04 cm0.4 mm <br />4.0e-4 m <br /> (0.07 cm0.7 mm <br />7.0e-4 m <br />) +
persistent +
membranous +
pubescent +  and glabrous +
glabrous +, white-tomentose +  and floccose +
synoecious +, monocarpic +, polycarpic +  and , +
3 +, 2 +  and 1 +