Arctostaphylos viridissima is a species of manzanita known by the common names whitehair manzanita and McMinn's manzanita. It is endemic to Santa Cruz Island, one of the Channel Islands of California.
Arctostaphylos viridissima is a shrub varying in shape and size. It may be a matted bush one metre (~3 ft) tall to a spreading treelike form over 4 metres (~12 ft) in height. Its stem and branches are covered in peeling red bark and its smaller twigs are woolly and bear long white bristles. The leaves are oval in shape, fuzzy when new and green and shiny when mature, reaching 3.5 cm.