Dedeckera (Polygonaceae), a New Genus from California
Reveal JL and Howell JT. 1976. Dedeckera (Polygonaceae), a New Genus from California. Brittonia. 28(2):245-251
A new genus and species, Dedeckera eurekensis, are described from the Last Chance Mountains, Inyo Co., California, from an area just south of the Eureka Valley sand dunes. A member of Polygonaceae, it is most closely related to Eriogonum, differing from that genus in lacking a tubular involucre, and from Stenogonum, Hollisteria, Nemacaulis, and Gilmania in being a shrubby perennial. It differs from all other members of the subfamily Eriogonoideae in having (1) a head of subsessile or sessile flowers borne on a slender peduncle and subtended by 2 to 5 foliaceous bracts, and (2) a single short-pedicellate axillary flower at the base of each peduncle. The numerous yellow-flowered heads are arranged in open cymose inflorescences that terminate short annually produced branches with alternately arranged exstipulate foliage leaves. Eriogonum flexum is transferred to the genus Stenogonum. A key to the genera of subfamily Eriogonoideae is included.
- Type
- Journal Article
- Authors
- Reveal, James; Howell, John
- Units
- DEVA , MOJA
- Keywords
- Absence (Biodiversity), Death Valley National Park CA NV, Dedeckera eurekensis (July Gold), Endemic Species, Polygonaceae (Knotweed), Polygonales, Presence (Biodiversity), Taxa Links To Datasets, Taxa Links To References, Vascular Plant, Vouchers