A pine is any conifer tree or shrub in the genus Pinus of the family Pinaceae. Pinus is the sole genus in the subfamily Pinoideae. World Flora Online, created by the Royal Botanic Gardens, Kew, and Missouri Botanical Garden, accepts 187 species names of pines as current, together with more synonyms, making it the largest family among the conifers. The American Conifer Society (ACS) and the Royal H... Wikipedia