Eriogonum fasciculatum var. flavoviride
Eriogonum fasciculatum var. foliolosum
California buckwheat, eastern Mojave buckwheat, Sonoran desert California buckwheat
California buckwheat, coastal California buckwheat, eastern Mojave buckwheat, leafy California buckwheat
usually glabrous.
thinly tomentose or glabrous.
blades linear or linear-oblanceolate, 0.6–1 × 0.05–0.2 cm, thinly tomentose to subglabrous and light green abaxially, subglabrous or glabrous and green adaxially, margins tightly revolute.
blades linear-oblanceolate to oblanceolate, 0.6–1.2 × 0.1–0.4 cm, densely white-tomentose abaxially, less so to green and floccose adaxially, margins plane usually tightly revolute.
mostly capitate;
branches glabrous.
open and mostly cymose;
branches thinly tomentose or glabrous.
turbinate-campanulate, 2–3 × 2–3 mm, glabrous or subglabrous.
turbinate, 3–4 × (1.5–)2–2.5 mm, pubescent.
glabrous or infrequently thinly pubescent.
pubescent at least proximally.
= 40.
= 80.
Eriogonum fasciculatum var. flavoviride
Eriogonum fasciculatum var. foliolosum
Variety flavoviride is a widespread, infrequent to common, warm-desert shrub found on the Mojave and Sonoran deserts in southern San Bernardino, Riverside and San Diego counties. The yellowish-green hue of the flowering stems, inflorescence branches, and leaves readily distinguish it from var. polifolium, with which it occasionally occurs (especially in Mexico), although this feature is not always obvious on herbarium specimens. Variety flavoviride is much more attractive in the garden than its more frequently planted Mojave Desert counterpart. Reports (e.g., R. S. Felger 2000) of var. fasciculatum along the coast in extreme northwestern Sonora are based on specimens of var. flavoviride.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
Variety foliolosum is widespread and common to abundant, often being a dominant shrub in the chaparral in the Coast Ranges of California (Kern, Los Angeles, Monterey, Orange, Riverside, San Benito, San Bernardino, San Diego, San Joaquin, San Luis Obispo, San Mateo, Santa Barbara, Santa Clara, Santa Cruz, Stanislaus, and Ventura counties). It is an octoploid and may be the product of an ancient hybridization involving the coastal var. fasciculatum and desert var. polifolium.
Variety foliolosum is being widely planted by the California Department of Transportation along roadsides, where it has hybridized with E. cinereum. As a very unfortunate result, the distribution of var. foliolosum has now expanded into northern California (Alameda, Marin, San Francisco, Trinity, and likely other countries) and even into Oregon (Jackson County). In southern Arizona, var. foliolosum has been introduced as a roadside plant in Maricopa County, and has been found (Bierner 90-45, ARIZ, TEX) escaped along a roadside in Graham County. Since this is a potentially aggressive weedy shrub, efforts should be made to curtail its introduction into areas outside its native range.
(Discussion copyrighted by Flora of North America; reprinted with permission.)
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