Cnidoscolus urens neglectus

Description

Cnidoscolus urens is a perennial,tropical American stinging herb belonging to the family Euphorbiaceae,and is one of some 100 species belonging to the genus Cnidoscolus (Gk.knidē-nettle,skōlos-thorn,Latin urens-burning).The plant is locally known as 'bull nettle','spurge nettle','bringamosa' and 'mala mujer' (evil woman). This species has an erect stem and is herbaceous when young,turning woody with age and from 50 to 150 centimeters tall.Leaves are lobed and large,while the white flowers occur in cymes,producing a spiny 3-seeded capsule with seeds rich in fats and proteins,resembling those of Ricinus communis.Its carunculate seeds are usually dispersed by ants (myrmecochory) attracted by the edible elaiosome.The entire plant is covered in stinging hairs,and has a native range covering Central and South America,being found in Costa Rica,El Salvador,Guatemala,Honduras,Mexico,Nicaragua,Panama,Peru and Venezuela. Cnidoscolus urens is monoecious and self-compatible.Its male and female flowers appear superficially similar,but differ structurally.The principal pollinator during the dry season is a butterfly,Eurema daira,which does not discriminate between male and female flowers.Female flowers,making up only some 6% of the total,produce almost no nectar and appear to mimic males in order to receive attention from the pollen- and nectar-gathering insect.Male flowers usually function for only 1 day,while female flowers may remain functional for up to 7 days if unpollinated.