The following Participating Institutions are custodians for this species in the CPC National Collection:
Rancho Santa Ana Botanic Garden
The conservation of Oxytheca parishii var. goodmaniana is fully sponsored.
Naomi Fraga contributed to this Plant Profile.
Oxytheca parishii var. goodmaniana (Cushenbury oxytheca) is a small wiry annual in the buckwheat family (Polygonaceae). The flowers consist of six small white petals (technically sepals) with reddish midribs that are found in clusters of three to twelve. Populations of O. parishii var. goodmaniana occur on limestone or a mixed lithology of limestone and dolomite (Tierra Madre Consulting 1992). Oxytheca parishii var. goodmaniana was federally listed in 1994 along with four other plant species that also grow on carbonate substrate. The five carbonate endemic plants species are restricted to limestone, dolomite, or other carbonate rock substrates of the San Bernardino Mountains.
Distribution & Occurrence
Oxytheca parishii var. goodmaniana occurs on limestone or a mixed lithology of limestone and dolomite often on steep and loose scree slopes (Tierra Madre Consulting 1992, USDA FS 2007). Oxytheca parishii var. goodmaniana grows in areas characterized by an open canopy with little to no accumulation of organic material.
|The estimated number of plants in 1990 was fewer than 3,000, in the four known populations at the time. There are currently 16 occurrences listed in the California Natural Diversity Database (CNDDB 2007), however 50 occurrences were documented in 1998 (Soza 1998). Because O. parishii var. goodmaniana is an annual species, the number of individuals fluctuates from year to year depending on the winter and spring rainfall and temperatures favorable for germination and seedling establishment (USFWS 1997).|
Conservation, Ecology & Research
Brown, H. 1991. Detailed geologic maps of the San Bernardino Mountains, Transverse Ranges Province, southern California. Geologic Society of America.