Helianthus nuttallii parishii (A.Gray) Heiser (1955:316)

Los Angeles sunflower

Taxonomy & Nomenclature

Synonyms: Helianthus parishii A.Gray in Proc. Amer. Acad. Arts 19: 7 (1883); Helianthus californicus var. parishii (A.Gray) Jeps. in Man. Fl. Pl. Calif.: 1077 (1925); Helianthus oliveri A.Gray in Proc. Amer. Acad. Arts 20: 299 (1885); Helianthus parishii f. oliveri (A.Gray) Cockerell in Torreya 18: 181 (1918)

Conservation Status

Extinct (Rejmánek, 2018; Knapp et al., 2020, 2021; POWO, 2024)

Last record: 1937 (Smith & York, 1984:2; Rejmánek, 2018; Knapp et al., 2021)

Distribution

Los Angeles area, California, USA

Biology & Ecology

Hypodigm

Media

References

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

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, Kennedy, Kathryn, Heidel, Bonnie and Gluesenkamp, Daniel. (2021). Vascular plant extinction in the continental United States and Canada. Conservation Biology 35(1): 360-368. https://doi.org/10.1111/cobi.13621 [Supporting Information (Appendix S1)]

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 15 May 2024]

Rejmánek, Marcel. (2018). Vascular plant extinctions in California: A critical assessment. Diversity and Distributions 24(1): 129-136. https://doi.org/10.1111/ddi.12665

Smith, James Payne, Jnr. (ed.) and York, Richard (DEM). (1984). Inventory of rare and endangered vascular plants of California. Special Publication No. 1 (3rd edition). Berkeley, California: California Native Plant Society. xviii + 174 pp.

Walter, Kerry S. and Gillett, Harriet J. (eds.). (1998). 1997 IUCN Red List of Threatened Plants. Compiled by the World Conservation Monitoring Centre. Gland, Switzerland & Cambridge, UK: IUCN – The World Conservation Union. lxiv + 862 pp.

http://vanishingflora.proboards.com/thread/1921/los-angeles-sunflower