OROPOGON LOXENSIS AND ITS NORTH 

 AMERICAN DISTRIBUTION 



In a paper by the writer on the American Species of Alectoria 

 (Mycologia 3 : 149, 191 1), Oropogon loxensis (Fee) Th. Fries was 

 excluded " on the ground of its distinctive spore differences," and 

 it was stated that the plant would be treated later in a special 

 paper. Material of this species is confined to the larger herbaria, 

 and is not abundant even in such collections. During last winter 

 I have had the opportunity of studying the material in the Mu- 

 seum d'histoire iiaturelle in Paris, through the kindness of Pro- 

 fessor Mangin and Monsieur Hariot. This material was deter- 

 mined by Nylander. 



The genus Oropogon was proposed for this species by Th. 

 Fries in 186 1. It was not recognized by Tuckerman (Gen. Lich. 

 14: 1872) as he argued that a parallel dissimilarity of spore color 



and cell structure occurred unnoticed in other genera (Acolium, 

 Calcium). Dr. Zahlbruckner (Nat. Pflanz. 220. 1907) recog- 

 nizes, however, the genus not only on account of its muriform 

 spores, but on account of its single-spored asci. Stizenberg 



R. Heber Howe, Jr. 



VioUow ax>s .M 



152 



