PRICE PER 1 SEED. Jatropha cinerea (Euphorbiaceae). Jatropha cinerea is native to Arizona and Mexico. It forms a small tree or large shrub, growing upto 18 feet high by about 12 feet wide at a moderate rate. They are winter deciduous. Leaves are lush and bright green, covering the plant all the way to the ground. It is a favourite by coaudiciform collectors. Sowing : Sow seeds in summer. Locality : Ex Hort. Date of harvest : October 2015.