Eriogonum arcuatum var. arcuatum

Common names: Baker’s wild buckwheat
Endemic
Synonyms: Eriogonum bakeri Greene Eriogonum flavum var. tectum S. Watson Eriogonum jamesii subsp. bakeri (Greene) S. Stokes Eriogonum jamesii subsp. flavescens (S. Watson) S. Stokes Eriogonum jamesii var. flavescens S. L. Welsh Eriogonum jamesii var. higginsii
Treatment appears in FNA Volume 5. Treatment on page 369. Mentioned on page 370.

Plants spreading, compact mats, (1–)2–3(–6) dm wide. Aerial flowering stems (0.3–)0.5–2 dm. Leaf blades oblanceolate to elliptic, (0.5–)1–3 × 0.5–1.5 cm. Inflorescences umbellate or compound-umbellate, branched 1–3 times, rarely capitate; bracts (0.3–)0.5–2 × (0.3–)0.4–1 cm. Involucres 3–7 × (3–)4–8 mm. Flowers (4–)5–8 mm.


Phenology: Flowering Jun–Oct.
Habitat: Sandy, clayey, gravelly, or rocky flats, slopes and outcrops, ledges and cliffs, mixed grassland, saltbush, creosote bush, blackbrush, and sagebrush communities, pinyon, juniper, or conifer woodlands
Elevation: 1000-3000 m

Distribution

V5 758-distribution-map.gif

Ariz., Colo., N.Mex., Utah, Wyo.

Discussion

Variety arcuatum is widely distributed and occasionally common from southeastern Wyoming south in central and western Colorado, eastern Utah, northern Arizona, and northwest New Mexico. Some specimens of var. arcuatum gathered in southeastern Wyoming can be difficult to distinguish from Eriogonum flavum. Plants with capitate inflorescences, sometimes recognized as var. higginsii, occur throughout the range of the variety. If such distinction is to be made, the earliest available epithet is tectum.

Selected References

None.

Lower Taxa

None.
James L. Reveal +
Greene +
Baker’s wild buckwheat +
Ariz. +, Colo. +, N.Mex. +, Utah +  and Wyo. +
1000-3000 m +
Sandy, clayey, gravelly, or rocky flats, slopes and outcrops, ledges and cliffs, mixed grassland, saltbush, creosote bush, blackbrush, and sagebrush communities, pinyon, juniper, or conifer woodlands +
Flowering Jun–Oct. +
Eriogonum bakeri +, Eriogonum flavum var. tectum +, Eriogonum jamesii subsp. bakeri +, Eriogonum jamesii subsp. flavescens +, Eriogonum jamesii var. flavescens +  and Eriogonum jamesii var. higginsii +
Eriogonum arcuatum var. arcuatum +
Eriogonum arcuatum +
variety +