Based on an August 2020 extract of the California Plant Rescue Database, California Botanic Garden has collected 1 seed accessions of Eremogone ursina from 1 plant occurrences listed in the California Natural Diversity Database. These collections together emcompass 50 maternal plants

Restricted to a unique habitat that occurs in a 240 square km-area in the San Bernardino Mountains of southern California. There are 19 extant EOs. Heavy off-road vehicle and hiking use is occurring and is a significant threat, as the fragile pebble plain habitat is extremely susceptible to long-persisting or irreversible damage from these activities. Some habitat was severely damaged by an act of vandalism involving a construction vehicle. Extensive potential habitat was probably lost with the construction of a dam and reservoir in the late 1800s.

Pebble plain habitat was likely destroyed due to the creation of Big Bear Lake in the 1880s. Residential and commercial development has also contributed to habitat loss. Other threats include: existing roads and trails bisecting habitat increased re

The California Natural Diversity Database reports 25 occurrences, 17 of these are on the San Bernardino National Forest. The number of individuals at each occurrence ranges from thousands of plants to hundred of plants, and the number of plants at most occurrences is unknown (CNDDB 2007).

Studies on genetic diversity of Arenaria ursina found a high degree of genetic variability between six sampled populations (Ciano 1983). Tim Krantz observed a vigorous response after fire (1981). He observed many plants surviving, fruiting and seeding in good densities. Fires intensity at the Arenaria ursina site and the month the fire occurred is unknown (USDA FS 2007a).

Barriers and signs have been installed to direct recreation use, and eight road segments affecting pebble plains were decommissioned in 1999. The Pebble Plain Habitat Management Guide was recently revised (2002). Conservation practices that should be considered for this species include (USDA FS 2007a): Implement strategies within the Pebble Plain Habitat Management Guide to the greatest extent practicable. Utilize the habitat suitability criteria and detection protocols developed for this taxon and apply to surveys at the project level. Survey all new occurrences of Arenaria ursina and any occurrences that have not been visited in the past ten years, and record occurrence status, habitat condition, and threats. Collect a herbarium voucher specimen of Arenaria ursina to document new occurrences or to verify a historical occurrence if the occurrence is not known to have been documented in at least ten years prior. Map known and new occurrences of Arenaria ursina in the plan area using NRIS data collection standards, and incorporate these occurrences into the GIS corporate database.

Survey all new occurrences of Arenaria ursina and any occurrences that have not been visited in the past ten years, and record occurrence status, habitat condition, and threats.

Establish and maintain a genetically representative seed bank