Northern Maritime Chaparral forms a nearly impenetrable shrub cover composed of several species of manzanitas, wild lilac, and chamise. In some places, silver-leaved manzanita forms the dominant vegetation, giving the hillsides a grey cast in spring and summer. This silvery chaparral has been called “Sand Chaparral.” Silver-leaved manzanita is one of the manzanitas that do not sprout from a ground-level swelling or burl following a fire, relying instead on fire-stimulated seed germination to renew vegetation. It typically grows to heights of 8 to 12 feet in the Ben Lomond sand hills, and taller in the Bonny Doon area. Several localized annual plants are associated with the Sand Chaparral, including two tiny annual monkeyflowers.