in botany, a genus of the cryptogamia clas. The calyx of the male is fleshy, cylindrical, and intire; the antheræ are very long, subulate, and two-valved; the calyx of the female is divided into six pieces; the seeds are three. There are only three species of the anthoceros, viz. the punctatus, or spotted anthoceros, a native of Britain; the laevis, a native of Europe and America; and the multifidus, a native of Germany.