The following Participating Institutions are custodians for this species in the CPC National Collection:
University of California Botanical Garden
Rancho Santa Ana Botanic Garden
The conservation of Senecio layneae is fully sponsored.
Holly Forbes contributed to this Plant Profile.
Laynes butterweed is a striking perennial herb with creeping rootstocks. The basal rosette of leaves have blue-green cast to their color; cauline leaves are reduced up the flowering stems. Stems can reach 1 meter tall and flower heads are 4-6 cm. across, with orange-yellow ray flowers appearing from April - July.
Distribution & Occurrence
This species grows in openings in rocky chaparral on Gabbro and serpentine soil formations in Sierran foothills.
|Less than fifty occurrences remain, with individual counts from less than ten to over 1,500. Counts of individuals are made difficult by the rhizomatous nature of the species.
Most known sites are scattered within a 16,200 ha (40,000 ac) area in western El Dorado County that includes the Pine Hill intrusion and adjacent serpentine. A few other colonies occur in the Eldorado National Forest and in the BLM Red Hills Management Area
Conservation, Ecology & Research
Roadside vegetation management
Ameliorate or eliminate threats.
Maintain metapopulation dynamics of at least 1 very large, 1 large, 7 medium, and 24 small occurrences throughout the Pine Hill formation; of at least 1 large, 2 medium and 5 small in western El Dorado County; of at least 2 medium and 4 small in Tuolumne County; and of at least 2 small in Yuba County. (Recovery Plan)