J. Arnold Arbor. 49: 279. 1968
Plants sometimes sprawling, 1–6 dm. Leaves petiolate to 52 mm, sessile distally; blade ovate to sometimes elongate-triangular, 1–8 cm, apex acuminate. Flowers: calyx rotate in flower to reflexed in fruit, 3–7 mm; petals 6–11 mm. Schizocarps on jointed pedicel near fruit; mericarps 10–12, to 10 mm, walls thin, papery. 2n = 14.
Phenology: Flowering Mar–Jan.
Habitat: Forests, grasslands, roadsides, weedy or disturbed sites
Elevation: 0–2000 m
Ariz., Calif., Fla., N.Mex., Tex., Mexico, West Indies, Central America, South America, introduced in Asia, Australia.
Given the weedy nature of Herissantia crispa, it would not be surprising to encounter it in other warm regions adjacent to the currently documented distribution.