Difference between revisions of "Eriogonum corymbosum var. corymbosum"

Common names: Crisp-leaf wild buckwheat
IllustratedEndemic
Synonyms: Eriogonum corymbosum var. divaricatum Reveal & Brotherson Eriogonum corymbosum var. erectum Eriogonum divergens Eriogonum effusum subsp. divaricatum (Torrey & A. Gray) S. Stokes Eriogonum effusum subsp. durum S. Stokes Eriogonum effusum subsp. salinum (A. Nelson) S. Stokes
Treatment appears in FNA Volume 5. Treatment on page 256. Mentioned on page 257, 258, 259, 265.
FNA>Volume Importer
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|subfamily=Polygonaceae subfam. Eriogonoideae
 
|subfamily=Polygonaceae subfam. Eriogonoideae
 
|genus=Eriogonum
 
|genus=Eriogonum

Latest revision as of 22:11, 5 November 2020

Subshrubs or shrubs, 3–10 × 3–10 dm. Leaves cauline 1/2 or more length of flowering stem; petiole 0.2–0.6(–0.8) cm; blade lanceolate to oblanceolate or elliptic, 1–3(–4.5) × (0.3–)0.5–1.5 cm, usually densely tomentose on both surfaces, sometimes less so and greenish adaxially. Inflorescences 3–10 cm; branches tomentose to floccose. Involucres 1.5–3.5 × 1–2 mm. Flowers 2–3.5 mm; perianth white to cream, glabrous. 2n = 40.


Phenology: Flowering Jul–Oct.
Habitat: Sandy to gravelly or clayey flats, washes, slopes, outcrops, and cliffs, saltbush, blackbrush, and sagebrush communities, pinyon-juniper and montane conifer woodlands
Elevation: 1200-2700 m

Discussion

Variety corymbosum is the common white-flowered expression of the species. It occurs in northern Arizona, western Colorado, eastern and southern Utah, and southwestern Wyoming. Montane plants in the northern part of the range in Utah and Wyoming with long, narrow, erect leaves have been called var. erectum; desert plants in east-central Utah with small crenulate leaves have been called var. divaricatum. Hybrids between the shrubby var. corymbosum and the herbaceous E. brevicaule have been named E. ×duchesnense Reveal (as species, including E. corymbosum Bentham var. albogilvum Reveal). The hybrid is known from Rio Blanco County, Colorado (Goodrich 21999, BRY), Uintah County (Neese & Sinclair 15056, BRY), Utah (Reveal & Reveal 725, BRY, UTC), and Wasatch County (Goodrich 16099, BRY) in northeastern Utah, and from Sweetwater County, Wyoming (Porter & Porter 10510, BRY, RM; Reveal & Reveal 2935, BRY, UTC). Given the limited distribution of E. corymbosum in Wyoming (Sweetwater County), it is considered a “species of concern” in that state.

Selected References

None.

Lower Taxa

None.
James L. Reveal +
Bentham +
Undefined subg. Eucycla +
Crisp-leaf wild buckwheat +
Ariz. +, Colo. +, Utah +  and Wyo. +
1200-2700 m +
Sandy to gravelly or clayey flats, washes, slopes, outcrops, and cliffs, saltbush, blackbrush, and sagebrush communities, pinyon-juniper and montane conifer woodlands +
Flowering Jul–Oct. +
in A. P. de Candolle and A. L. P. P. de Candolle, Prodr. +
Illustrated +  and Endemic +
Eriogonum corymbosum var. divaricatum +, Eriogonum corymbosum var. erectum +, Eriogonum divergens +, Eriogonum effusum subsp. divaricatum +, Eriogonum effusum subsp. durum +  and Eriogonum effusum subsp. salinum +
Eriogonum corymbosum var. corymbosum +
Eriogonum corymbosum +
variety +