Torrey Pines ( Pinus torreyana & Pinus torreyana ssp. insularis) = rarest pine species in North America, limited to Del Mar, CA and Santa Rosa Island (SRI), CA. The presence of non-native ungulates on SRI from 1833 to 2011 prevented P. torreyana ssp. . . .

The Santa Rosa Island Torrey pine (Pinus torreyana var insularis) is the rarest endemic pine species on the North American continent (Hall and Brinkman 2013). These pines exists within four stands on Santa Rosa Island (North, Cogan, Main, and Box), wh . . .

The rare and endemic Torrey pine (Pinus torreyana var insularis) is distributed across the northwest coast of Santa Rosa Island in Channel Islands National Park, off the coast of Southern California. In 2014-2015, capstone students conducted a demogra . . .

Pinus torreyana is an endemic pine tree native to Santa Rosa Island (SRI), California that had historically faced diminished populations due to sheep grazing and intensive ranching (Wells 1996). The National Park Service (NPS) gained full jurisdiction . . .

Torrey pine (Pinus torreyana and Pinus torreyana ssp. insularis) is the rarest pine species in North America, with populations limited to Del Mar, CA and Santa Rosa Island (SRI), CA (IUCN 2013). Over the past 150 years, grazing by non-native ungulates . . .