1. any member of a number of plant species

a. Astrocasia tremula

b. Guarea guidonia (muskwood), of the tropical Americas.

c. Cistus ladanifer (gum rockrose, labdanum, common gum cistus, brown-eyed rockrose), of coastal regions of the western Mediterranean.

d. Solanum elaeagnifolium (silverleaf nightshade, silver-leaved nightshade)

e. Thunbergia alata (black-eyed Susan vine), of tropical Africa.