Lineae
Including Erythroxyleae. A small order of herbs, shrubs, or rarely trees, glabrous or rarely hirsute or tomentose. Flowers regular, hermaphrodite, usually terminal, in racemes, panicles, corymbs, heads, fascicles, or spikes; petals often blue, yellow, or white, rarely pink, fugacious, or, in a few genera, persistent. Leaves alternate, or very rarely opposite, simple, entire. Linum usitatissimum yields the flax and linseed of commerce. There are fourteen genera, and 135 species. Illustrative genera are: Erythroxylon, Ixonanthes, Linum.