Extriplex joaquinana is a species known by the common name San Joaquin saltbush. It was formerly included in genus Atriplex.
| Extriplex joaquinana | |
|---|---|
Scientific classification 
| |
| Kingdom: | Plantae |
| Clade: | Tracheophytes |
| Clade: | Angiosperms |
| Clade: | Eudicots |
| Order: | Caryophyllales |
| Family: | Amaranthaceae |
| Genus: | Extriplex |
| Species: | E. joaquinana
|
| Binomial name | |
| Extriplex joaquinana | |
| Synonyms | |
|
Atriplex joaquinana A.Nelson | |
Distribution
editIt is endemic to California,[1][2] where it grows in alkaline soils in the Sacramento-San Joaquin River Delta and adjacent parts of the Central Valley and eastern Central Coast Ranges.
Description
editThis is an annual herb growing erect to a maximum height near one meter. The leaves are 1 to 7 centimeters in length, often scaly, green to gray-green in color, and oval to triangular in shape. The leaves are mostly located lower on the erect plant; those further up the stem are reduced in size. The inflorescences of male flowers are dense, heavy spikes, and the female flowers are held in smaller clusters.
Systematics
editThe first publication of this taxon was in 1904 by Aven Nelson as Atriplex joaquinana A.Nelson (in: Proceedings of the Biological Society of Washington 17(12): 99).[3] (It has sometimes been wrongly spelled Atriplex joaquiniana). In 2010, after phylogenetic research, Elizabeth H. Zacharias classified it in a new genus Extriplex, as Extriplex joaquinana (A.Nelson) E.H.Zacharias.[4] Extriplex joaquinana belongs to the tribe Atripliceae in the subfamily Chenopodioideae of Amaranthaceae.[4]
References
edit- ^ Jepson Manual Treatment
- ^ Atriplex joaquiniana in Flora of North America
- ^ Extriplex joaquinana at Tropicos
- ^ a b Elizabeth H. Zacharias, Bruce G. Baldwin (2010): A Molecular Phylogeny of North American Atripliceae (Chenopodiaceae), with Implications for Floral and Photosynthetic Pathway Evolution. In: Systematic Botany 35(4), p.839-857. doi:10.1600/036364410X539907
External links
edit
- "Extriplex joaquinana". National Center for Biotechnology Information (NCBI).
- USDA Plants Profile for Atriplex joaquinana
- Atriplex joaquinana — UC Photo gallery
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