COMMELINACEAE - Spiderwort Family

Perennial herbs with succulent stems, stems jointed

Leaves sheathing at base, alternate, entire

Flowers bisexual, actinomorphic except for Commelina

50 genera, 700 species

Economic importance - ornamentals
Tradescantia - spiderwort
Commelina - dayflower, 2 large petals + 1 small petal
Rhoeo - also used in demos of chromosome preps.
Zebrina - wandering Jew

Diagnostic characteristics: herbs with succulent stems, leaves with closed basal sheaths