Regularity: Regularly occurring
Localities documented in Tropicos sources
United States (North America)
Note: This information is based on publications available through Tropicos and may not represent the entire distribution. Tropicos does not categorize distributions as native or non-native.
- Hartman, R. L. & B. E. Nelson. 1998. Novelties from North America north of Mexico: A 20-Year Vascular plant Diversity Baseline. 1–51 (mss.). http://www.tropicos.org/Reference/11044
- Nakai, K. M. 1987. Some new and reconsidered California Dudleya (Crassulaceae). Madroño 34: 334–353. http://www.tropicos.org/Reference/9342
Comments: Nakai (1987) stated that this subspecies was on northern slopes, whereas spp. ovatifolia was on southern slopes, in the Santa Monica Mountains.
National NatureServe Conservation Status
Rounded National Status Rank: N1 - Critically Imperiled
NatureServe Conservation Status
Rounded Global Status Rank: T1 - Critically Imperiled
Reasons: Dudleya cymosa subsp. agourensis was described in 1987, from the eastern Santa Monica Mountains (west of Los Angeles) in California. Dudleya cymosa subsp. ovatifolia, with which it is considered to be most taxonomically similar (Nakai 1987; cf. Kartesz 1999), or the same (Hickman 1993; USFWS 1997), is also rare. Under the U.S. Endangered Species Act, ssp. agourensis is considered a synonym of ssp. ovatifolia, listed as Threatened.
Biological Research Needs: Evaluate whether this taxon is distinct from ssp. ovatifolia (note Nakai 1987; Bartel in Hickman 1993; USFWS 1997, 1999; Kartesz 1999; CA NDDB 8/2000).
Names and Taxonomy
Comments: This taxon (which was described in 1987) is recognized by Kartesz (1999) and the California Natural Diversity Database (8/2000); it is included as a synonym of D. cymosa ssp. ovatifolia by J.A. Bartel (1993) in the new Jepson manual (Hickman 1993), Skinner and Pavlik (1994) in the California Native Plant Society's Inventory of Rare and Endangered Vascular Plants of California, and the USFWS in the 1/29/97 listing of D. cymosa ssp. ovatifolia as Threatened, under the U.S. Endangered Species Act.