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. This is a shrub varying in shape and size. It may be a matted bush one meter tall to a spreading treelike form over 4 meters 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 centimeters. The inflorescence is a dense cluster of urn-shaped manzanita flowers. The fruit is a fuzzy drupe just over a centimeter wide.
