The world's largest stand of Tecate cypress (Cupressus forbesii) are found at Otay Mountain Wilderness, as are at least 15 plant species that are candidates for federal listing as threatened or endangered species.
In all 37 plant species found on Otay Mountain are listed as sensitive by the California Native Plant Society, at least five, including the Tecate cypress, occur only on Otay Mountain or in the immediate are.

Particularly important species include: 
Cleveland's monkeyflower (Mimulus clevelandii)
Mexican flannelbush (Fremontodendron mexicanum)
Otay Mountain lotus (Lotus crassifolius var.
otayensis)
Southern mountain misery (Chamaebatia australis)
San Miguel savory (Satureja chandleri).
The world's largest stand of Tecate cypress (Cupressus forbesii) are found at Otay Mountain Wilderness, as are at least 15 plant species that are candidates for federal listing as threatened or endangered species. In all 37 plant species found on Otay Mountain are listed as sensitive by the California Native Plant Society, at least five, including the Tecate cypress, occur only on Otay Mountain or in the immediate are.
Particularly important species include: 
Cleveland's monkeyflower (Mimulus clevelandii)
Mexican flannelbush (Fremontodendron mexicanum)
Otay Mountain lotus (Lotus crassifolius var. otayensis)
Southern mountain misery (Chamaebatia australis)
San Miguel savory (Satureja chandleri).
Otay Mountain Wilderness