Quercus parvula

Quercus parvula, the Santa Cruz Island oak, is an evergreen red oak found on north-facing Santa Cruz Island slopes and in the California Coast Ranges from Santa Barbara County north to Mendocino County. It was taxonomically combined with Quercus wislizeni until resurrected as a separate species by Kevin Nixon in 1980. The type locality of Q. parvula var. shrevei (originally described by C.H. Muller as Q. shrevei) is Palo Colorado Canyon in Monterey County. It is placed in Quercus section Lobatae. Three varieties of Q. parvula are currently recognized: Q. parvula differs morphologically from its close relative Q. wislizeni in the following ways: Leaf blades are larger, > (2)4 cm long rather than < 4(6) cm Leaf blades are thinner, generally < 0.26 mm near the apex rather than usually > 0.26 mm Current year twigs are 5-sided rather than ± roundish in cross section Leaf petioles and current year twigs are glabrous to sparsely hairy rather than moderately to very hairy Nut tips are blunt ......read more on Wikipedia.