Streptanthus lemmonii S.Watson (1890:125)
Taxonomy & Nomenclature
Listed twice by (Humphreys et al., 2019), under S. lemmonii (extinct) and erroneously under the different taxon Caulanthus lemmonii (as a synonym of Caulanthus coulteri lemmonii). Also listed under the different taxon Caulanthus lemmonii by (WCMC, 1992:218) who gives the geographical distribution as Arizona and not California, and thus it is clear that they are really talking about this taxon.
Conservation Status
Extinct (WCMC, 1992:218; Humphreys et al., 2019; POWO, 2024; Christenhusz & Govaerts, 2025) or Invalid (synonym of S. tortuosus) (Knapp et al. 2020)
Last record: 1890 (Christenhusz & Govaerts, 2025)
Distribution & Habitat
Santa Catalina Mountains, Arizona, USA
Biology & Ecology
Hypodigm
Media
References
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2023). Uitgestorven. Op plantenjacht rond de wereld: 1-511. Sterck & De Vreese.
Christenhusz, Maarten J. M. and Govaerts, Rafaël. (2025). Plant extinction in the Anthropocene. Botanical Journal of the Linnean Society 207(3): 183-196. https://doi.org/10.1093/botlinnean/boae045 [Appendix S1]
CPC. (1992). Centre for plant conservation data for North American plants database. CPC, Centre for plant conservation.
Humphreys, Aelys M., Govaerts, Rafaël, Ficinski, Sarah Z., Lughadha, Eimear Nic and Vorontsova, Maria S. (2019). Global dataset shows geography and life form predict modern plant extinction and rediscovery. Nature Ecology & Evolution 3: 1043-1047. https://doi.org/10.1038/s41559-019-0906-2 [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. https://doi.org/10.1038/s41559-020-1146-1
POWO. (2024). Plants of the World Online (online resource). Facilitated by the Royal Botanic Gardens, Kew, United Kingdom. Available at: https://powo.science.kew.org/ [Accessed 4 May 2024]
WCMC (World Conservation Monitoring Centre). (1992). Global Biodiversity: Status of the Earth's living resources. London: Chapman & Hall. xx + 594 pp.
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