cleistogamous
Cleis`to*gam"ic, Cleis*tog"a*mous a. Etym: [Gr. (Bot.) Defn: Having, beside the usual flowers, other minute, closed flowers, without petals or with minute petals; -- said of certain species of plants which possess flowers of two or more kinds, the closed ones being so constituted as to insure self-fertilization. Darwin.