Linaceae


Linaceae is a family of flowering plants. The family is cosmopolitan, and includes about 250 species in 14 genera, classified into two subfamilies: the Linoideae and Hugonioideae. Leaves of the Linaceae are always simple; arrangement varies from alternate to opposite or whorled. The hermaphroditic, actinomorphic flowers are pentameric or, very rarely, tetrameric.
In the Linoideae, the largest genus is Linum, the flaxes, with 180–200 species including the cultivated flax, Linum usitatissimum. Members of the Linoideae include herbaceous annuals and perennials, as well as woody subshrubs, shrubs, and small trees inhabiting temperate and tropical latitudes of Eurasia, Africa, Australia, and the Americas. The largest genus of the Hugonioideae is Hugonia ; the Hugonioideae are woody vines, shrubs, and trees, and are almost entirely tropical in distribution. In addition to their growth habits and geographic distributions, the Linoideae and Hugonioideae can be differentiated by the number of fertile stamens and fruit type.
Genera in subfamily Linoideae
Genera in subfamily Hugonioideae
Under the old Cronquist system of classifying the flowering plants, the Linaceae were placed in their own order, the Linales. Modern classifications place them in the order Malpighiales.