Quercus
Quercus is a genus of trees and shrubs in the beech family, Fagaceae. Its species produce acorns and include the true oaks.
Fagaceae: A family of flowering plants that includes oaks, beeches, and chestnuts. Quercus is one of Fagaceae’s largest genera.
Oak pollination: The transfer of pollen between oak flowers, primarily by wind. Wind pollination enables reproduction across many Quercus habitats.
Oak timber: Wood from oak trees, valued for strength, durability, and distinctive grain. Quercus species supply widely used hardwood lumber.
English oak: Quercus robur, a widespread European oak with lobed leaves and short-stalked acorns. It is a characteristic species of European Quercus.
Acorn: A nut containing a seed, produced by oak trees and their relatives. Acorns are the characteristic fruits of Quercus species.
Oak hybridization: Interbreeding between distinct oak species, producing offspring with mixed ancestry. Hybridization contributes to blurred species boundaries in Quercus.
Cork oak: Quercus suber, a Mediterranean oak whose bark yields commercial cork. It is a distinctive Quercus species cultivated for a renewable material.
Coast live oak: Quercus agrifolia, an evergreen oak native to coastal California and northern Baja California. It shows the genus’s evergreen adaptations in western North America.
Oak gall: An abnormal growth on an oak, often induced by insects or mites. Many gall-making insects depend on Quercus species.
Masting: Synchronized, highly variable seed production by a population of plants. Many oaks produce acorns in mast years, shaping animal populations and seed survival.