ADDITIONS TO THE PYRENOLICHEN FLORA OF NORTH-AMERICA

Fourteen species of pyrenocarpous lichens are reported from North Amer ica. Catapyrenium congestum is described as new. Catapyrenium podolepi s, C. psoromoides, C. umbrinum, Dermatocarpon lorenzianum, Endocarpon adsurgens, Placidiopsis cinerascens, and Verrucaria zamenhofiana are d ocumented for North America for the first time. Catapyrenium rufescens and C. waltheri are confirmed for North America; Placidiopsis cervinu la is deleted from the North American lichen checklist. Range extensio ns are cited for Catapyrenium andicola, C. chilense, C. norvegicum, an d Placidiopsis pseudocinerea. Catapyrenium norvegicum is new to Canada . An updated key to the Catapyrenium species in North America is provi ded.