Streptanthus lemmonii (S. Watson) Jeps.



Taxonomy & Nomenclature

Synonym/s: Caulanthus coulteri lemmonii (S.Watson) Munz; Caulanthus lemmonii S.Watson; Streptanthus parryi Greene; Streptanthus coulteri lemmonii (S.Watson) Jeps.


Invalid (synonym of Streptanthus tortuosus) (Knapp et al., 2020)


Listed twice by (Humphreys), under S. lemmonii (extinct) and Caulanthus lemmonii (as a synonym of Caulanthus coulteri). The latter because they are only concerned with extinct and rediscovered species and not valid subspecies.


Conservation Status

Invalid (synonym). Listed as extinct by (Humphreys et al., 2019)



Santa Catalina Mountains, Arizona, USA


Biology & Ecology










CPC (1992). Centre for plant conservation data for North American plants database. CPC, Centre for plant conservation.

Humphreys, Aelys M. et al. (2019). Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nature Ecology & Evolution 3: 1043-1047. [Abstract] [Supplementary Dataset 1]

Knapp, Wesley M., Frances, Anne, Noss, Reed, Naczi, Robert F. C., Weakley, Alan, Gann, George D., Baldwin, Bruce G., Miller, James, McIntyre, Patrick, Mishler, Brent D., Moore, Gerry, Olmstead, Richard G., Strong, Anna, Gluesenkamp, Daniel and Kennedy, Kathryn (2020). Regional records improve data quality in determining plant extinction rates. Nature Ecology & Evolution 4: 512-514.


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