Description: Herbaceous annuals, biennials or perennials.
Leaves alternate, mostly with Kranz (C4) anatomy.
Flowers bisexual, axillary, sessile, subtended by a pair of leaf-like bracteoles. Perianth segments 5, each developing a lateral wing-like appendage. Stamens 5. Stigmas 2.
Fruiting perianth with 5 fan-like wings. Embryo in a conical spiral.
Distribution and occurrence: World: >100 species, cosmopolitan. Australia: 1 species (native).
Text by S. W. L. Jacobs
Taxa not yet included in identification key