Cannabis Sativa October 12, 2016October 12, 2016 thcscience_admin Grass pea is a common name for several plants, and may refer to: Lathyrus nissolia[1] Lathyrus sativus References[edit] ^ Stokoe, W.J. The Observer's Book of Wild Flowers (1965 ed.). Frederick Warne & Co. Ltd. p. 88.