Blue and white periwinkles in bloom in December. There are a lot of periwinkle vines near the entrance to the preserve and around the abandoned buildings. Perhaps they are left over from when the Jesuits lived here?
(Bear Creek Redwoods)
Vinca major, with the common names bigleaf periwinkle, large periwinkle, greater periwinkle and blue periwinkle, is species of flowering plant in the family Apocynaceae, native to the western Mediterranean. Growing to 25 cm (10 in) tall and spreading indefinitely, it is an evergreen perennial, frequently used in cultivation as groundcover.