Sidalcea hickmanii ssp. anomala
|Cuesta Pass checkerbloom, Cuesta Pass sidalcea|
|Dieter Wilken, Ph.D.|
The following Participating Institutions are custodians for this species in the CPC National Collection:
Regional Parks Botanic Garden
Rancho Santa Ana Botanic Garden
Santa Barbara Botanic Garden
The conservation of Sidalcea hickmanii ssp. anomala is fully sponsored.
Dieter Wilken, Ph.D. contributed to this Plant Profile.
Cuesta Pass Sidalcea has multiple, ascending stems from 0.4 to 1 m long. Each stem bears many flowers, which are less than 1 inch in diameter and have bright pinkish lavender petals. This species is a typical "fire follower", with 1000's of plants reported within the first 2-3 years following a chaparral fire. However, most populations appear to have relatively few plants after 5 or more years following such fires. Regardless, the documented distribution is restricted to about 4-5 occurrences in an area of no more than 5 square kilometers.
Distribution & Occurrence
Open rocky slopes and talus composed of serpentine, sometimes near abandoned mine spoils and near roads, in chaparral and at the margins of cypress woodlands. Common associates include Quercus durata, Arctostaphylos obispoensis, Ceanothus spp., and Cupressus sargentii. (Hitchcock 1957)
|Known from 4-5 occurrences, each with 20 to over 100 individual plants. Censuses conducted within 1-2 years following fires reveal higher number of plants, suggesting that this species appears to be more abundant after fires and that it is usually represented by a substantial seed bank. (CDFG 2002)|
Conservation, Ecology & Research
Erosion at some road cuts and adjacent trenches.
Populations on land managed by the California National Guard (Camp San Luis Obispo) are in restricted areas, but proposed mine reclamation may adversely affect some populations.
Studies of the breeding system and seed biology, including germination requirements.
Andreasen, K.; Baldwin, B.G. Phylogeny, unequal evolutionary rates, and biogeography in the western North American genus Sidalcea (Malvaceae). Botany 2000!; 6-10 August, 2000; Oregon Convention Center, Portland, OR. 2000.