Endangered and Threatened Wildlife and Plants; Determination of Endangered Status for Ten Plants and Threatened Status for Two Plants From Serpentine Habitats in the San Francisco Bay Region of California

The U.S. Fish and Wildlife Service (Service) determines endangered status pursuant to the Endangered Species Act of 1973, as amended (Act) for 10 plants: Castilleja affinis ssp. neglecta (Tiburon paintbrush), Ceanothus ferrisae (coyote ceanothus), Cirsium fontinale var. fontinale (fountain thistle), Clarkia franciscana (Presidio clarkia), Cordylanthus tenuis ssp. capillaris (Pennell's bird's-beak), Dudleya setchellii (Santa Clara Valley dudleya), Eriophyllum latilobum (San Mateo woolly sunflower), Pentachaeta bellidiflora (white-rayed pentachaeta), Streptanthus albidus ssp. albidus (Metcalf Canyon jewelflower), and Streptanthus niger (Tiburon jewelflower). The Service also determines threatened status for two plants, Calochortus tiburonensis (Tiburon mariposa lily) and Hesperolinon congestum (Marin dwarf-flax). These species are restricted to serpentine soil outcrops in the area near San Francisco Bay, California. The 12 plants have been variously affected and are threatened by one or more of the following: urbanization, pedestrian, and off-road vehicular traffic, the invasion of alien plants, road maintenance, soil erosion and slipping, unauthorized dumping, livestock grazing, seed predation by beetles, and stochastic extinction by virtue of the small, [[Page 6672]] isolated nature of the remaining populations. This rule implements the Federal protection and recovery provisions afforded by the Act for these plants.