Swaziland's Alien Plants Database

Ricinus communis L.
castor bean, castorbean tree, castor oil bush, castor oil plant, castor oil tree, wonder tree
Invasive, Problem species
Origin: Tropical East and North Eastern Africa
Growth Form: Herb
Plant Description: Plant: Annual herb, softly woody shrub or small tree up to 4 m high; sap not milky (as in Jatropha spp.), leaf and flowering stalks often with a grey bloom. Leaves: Shiny, dark green or reddish, paler below, large, up to 300 mm wide, palmately five- to nine-lobed, margins closely serrated, petioles up to 300 mm long. Flowers: Reddish (upper), cream (lower), on stalks up to 150 mm long, August–April (–all year). Fruit: Green, brown or reddish, three-lobed capsules, 10–15 mm long, covered with soft spines; seeds silvery mottled-brown “beans”.
Key Features:
Control: herbicides and chopping them up
More information:
Weeds & Invasive Plants Home Page
NRCS Plants Database


USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913. Illustrated flora of the northern states and Canada.

Photo - fruit/leaves

K Braun, Swaziland's Alien Plants Database

Photo - plant

Rob Mackenzie, Swaziland's Alien Plants Database

Photo - flowers/leaves

The Weeds Society of Western Australia

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