A Revised Classification of the Anthocerotophyta and a Checklist of the Hornworts of North America, North of Mexico

Abstract

A hornwort classification that recognizes 11 genera, comprising a hierarchy of two classes, three orders, and four families is proposed. The updated checklist of these bryophytes for North America has been expanded from 11 species in three genera to 17 species in five genera. Application of the genus name Anthoceros in the traditional sense is clarified.