Seeds from three locations stored at The Berry Botanic Garden.

Collect and store seeds from known populations. Determine optimum propagation procedures and develop reintroduction protocols.

Survey potential habitat for additional populations (Fredricks 1989). Determine the mechanism facilitating endemism to serpentine soils (Fredricks 1989). Soil and microsite analysis to identify critical factors to recruitment and success (Fredricks 1989). Continued monitoring (Fredricks 1992).

In a three-year comparative demographic study of Calochortus coxii, permanent plots were monitored at two sites. Among C. coxii plants, bud production was highest and plants were most dense and larger on average in the ecotone (transition between coniferous forest and forb/grass meadow) habitat. Transition matrix models revealed that C. coxii was stable at one site, but clearly declining at another. Results were compared to a similar study with Calochortus umpquaensis (Fredricks 1993). Demographic comparisons using matrix model analysis of empirical data were made among eight Calochortus species. Results paint a mixed picture of population dynamics. For all species, population stage distribution (proportion of seedlings, juveniles, and reproductive adults) was highly variable between populations, habitats, and years. (Feidler et al. 1998). Germination trials indicate that germination is stimulated by long periods (12-14 weeks) of cold, moist, dark stratification. This ensures that the seed will only germinate in the spring, when the seedlings chance for survival is greatest (Florance 1994). In germination studies at The Berry Botanic Garden, 100% germination was obtained after 8 weeks of cold stratification followed by a constant 68F (20C) environment. Between 80-100% of seeds germinated with 8 weeks of cold stratification and an alternating 50F/68F (10/20C) environment (BBG file).

Bulb collection and flower picking (Fredricks 1989). Grazing (Fredricks 1993). Seed predation (Fredricks 1993).

An Oregon endemic first discovered and described in 1988, this species is restricted to north-facing slopes on serpentine soils (FNA 2002). Its known distributional range is an area of less than 2600 hectares (in a province believed to be the center of speciation for a unique group of Calochortus). The species' habitat is heavily impacted by grazing, roads (Interstate 5 intersects a large population), and logging. Overgrazing, in particular, appears to have reduced the size of the population. Fire suppression is also causing habitats to shrink, and development from nearby towns is encroaching on habitats and making prescribed burning more difficult.

There are 11 known sites, of which 8 are on Bureau of Land Management (BLM) land and 3 on private land. Population numbers as of 1992 and 1993 ranged from as little as two individuals to over 5,000, but most populations contained between 100 and 1000 individuals (ONHDB 2000).

Seeds from three locations stored at The Berry Botanic Garden.