Fischer, E. (2020) Papaveraceae Flore d'Afrique Centrale Nouvelle Serie Botanic Garden Meise, Belgium
Description of the genus
Annual or biennial herbs with yellow latex. Leaves deeply pinnately lobed or incised, spiny. Sepals 3, horned at the apex. Petals 6. Stigma ± capitate at apex, 4-6-lobed.
Worldwide: c. 23 species in North and South America, West Indies and Hawaii.