CRUMIA, A NEW GENUS OF THE POTTIACEAE ENDEMIC TO WESTERN NORTH AMERICA

Abstract

A new genus of the Pottiaceae, Crumia, is proposed to accommodate Merceya latifolia Kindb. This species is shown not to be closely related to Merceya, but probably has greater affinity to Tortula and Desmatodon. Both sporophyte and gametophyte are described and illustrations show detailed structure and distribution.