Rare Plant Conservation Planning

PCI works with private landowners, public entities, and other organizations to facilitate the protection and conservation of rare plants throughout Marin, Mendocino, and Sonoma counties. We have worked in settings ranging from coastal wetland, scrub, and dunes to grassland, redwood forest, serpentine, and Sargent cypress habitats to prepare mitigation, restoration, protection, and monitoring plans for many rare plant taxa. We apply our in-depth regional botanical knowledge together with our first-hand experience in native plant restoration to identify effective, implementable approaches to protecting and enhancing conditions for these species. See the list below for some of the rare species that PCI’s rare plant work has focused on.










Forest and woodland habitats:

  • fringed corn lily (Veratrum fimbriatum)
  • swamp harebell (Campanula californica)
  • Napa false indigo (Amorpha californica var. napensis)

Serpentine and chaparral habitats:

  • Calistoga ceanothus (Ceanothus divergens)
  • Mt. St. Helena morning glory (Calystegia collina ssp. oxyphylla)
  • Mt. Tamalpais manzanita (Arctostaphylos montana ssp. montana)

Grassland habitats:

  • round leaved filaree (California macrophylla)

Wetland and coastal habitats:

  • dark-eyed gilia (Gilia millefoliata)
  • woolly-headed spineflower (Chorizanthe cuspidata var. villosa)
  • coastal bluff morning glory (Calystegia purpurata ssp. saxicola)
  • Humboldt bay owl’s clover (Castilleja ambigua ssp. humboldtiensis)
  • Lyngbye’s sedge (Carex lyngbyei)