Anthoceros agrestis, a new name for A. punctatusvar. cavernosus sensu Prosk. 1958, non (Nees) Gottsche et al.

Abstract

Anthoceros punctatus var. cavernosus Prosk. homon. illeg. is renamed A. agrestis Paton, redescribed, illustrated and compared with A. punctatus L. (A. husnotii Steph.). The thalli and sporophytes are usually smaller in A. agrestis than in A. punctatus and the antheridial bodies are significantly smaller. World distributions and brief descriptions of British habitats are included for both species showing that A. agrestis is more restricted than A. punctatus in its distribution and ecology.