Eriogonum thompsoniae var. atwoodii

Reveal

Great Basin Naturalist 34: 245. 1974.

Common names: Atwood’s wild buckwheat
Synonyms: Eriogonum corymbosum var. atwoodii (Reveal) S. L. Welsh
Treatment appears in FNA Volume 5. Treatment on page 262. Mentioned on page 261.
Revision as of 21:23, 26 July 2019 by FNA>Volume Importer
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Plants 3–4 dm. Leaf blade linear, 3–8(–10) × 0.2–0.4(–0.6) cm, thinly to moderately tomentose abaxially, margins often slightly revolute. Involucres 2–3 mm. Perianths white or yellow.


Phenology: Flowering Jul–Oct.
Habitat: Red, gypsophilous clay flats and slopes, saltbush, blackbrush, and sagebrush communities
Elevation: 1400-1500 m

Discussion

Variety atwoodii is known only from two locations, one near Fredonia, and a second along the Honeymoon Trail, both in Mohave County. It appears to be an established, albeit rare, variety that probably is the result of past hybridization involving E. thompsoniae var. albiflorum and E. mortonianum. The Bureau of Land Management in Arizona considers Atwood’s wild buckwheat a taxon of special concern.

Selected References

None.

Lower Taxa

None.
James L. Reveal +
Reveal +
Undefined subg. Eucycla +
Atwood’s wild buckwheat +
1400-1500 m +
Red, gypsophilous clay flats and slopes, saltbush, blackbrush, and sagebrush communities +
Flowering Jul–Oct. +
Great Basin Naturalist +
Eriogonum corymbosum var. atwoodii +
Eriogonum thompsoniae var. atwoodii +
Eriogonum thompsoniae +
variety +