About Quercus peninsularis Trel.
Quercus peninsularis, commonly known as the peninsular oak, is an oak species endemic to Baja California, Mexico. It grows as a shrub or small tree reaching up to 10 meters in height, and occurs in mountain valleys and canyons at elevations up to 3000 meters. This species is classified in oak section Lobatae. Its leaves measure 5 to 8 cm long, are flat, leathery and hairy, have pointed tips, and bear 2 to 5 pairs of teeth. Its flowers grow in catkins that are 3 cm long. Its fruits are 1.5 cm acorns: they are stemless, ovoid, have hairy cupules, and mature within one year. Mature bark of this species is reddish, while young twigs are thin and covered in hairs.
