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FNA | Family List | FNA Vol. 5 | Polygonaceae | Eriogonum

214b. Eriogonum cithariforme S. Watson var. agninum (Greene) Reveal, Aliso. 7: 223. 1970.

Santa Ynez wild buckwheat

Eriogonum agninum Greene, Pittonia 2: 165. 1891; E. gracile Bentham var. polygonoides (S. Stokes) Munz; E. vimineum Douglas ex Bentham var. agninum (Greene) S. Stokes; E. vimineum subsp. polygonoides S. Stokes

Leaves: petiole not winged; basal blade elliptic to ovate or nearly rounded. Flowering stems and inflorescence branches glabrous.

Flowering May-Oct. Sandy flats and slopes, chaparral communities, oak and montane conifer woodlands; 500-1800(-2100) m; Calif.

Variety agninum is known primarily from the mountains of Santa Barbara and Ventura counties. A single collection (Davidson 1617, NY) found along Big Rock Creek in Los Angeles County in 1900, and the type of subsp. polygonoides, gathered in San Luis Obispo County, are from disjunct populations. This variety is sometimes difficult to differentiate from E. davidsonii.


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