Nyctaginaceae, Caryophyllales.
Only species and variety in genus on San Clemente Island. Perianth unusually pale for this variety, but not unheard of.
Agaricaceae, Agaricales.
Xanthonychidae (a family of air-breathing land snails), order Stylommatophora (most land snails and slugs). Xerarionta: I can't find the etymology.
An endangered species endemic to San Clemente Island