Chardon : Pyrenomycetes of Porto Rico 



295 



Material examined: 



On cow dung. Porto Rican Fungi (Fink), IX^tf^i, Maya- 



guez ' Dec ' 3 ' I9IS - . L JAN 2 6 1922 ' 



Sphaeriaceae 



Herpotrichia albidostoma (Schw.) Sacc, Syll. rs^g/^^jS^^^^ 

 1 891, 



There have been thus far only four collections of Herpotrichia 

 made from the island : two of them collected by Stevenson and 

 two by the writer. Stevenson (37) refers one of his collections 

 to H. albidostoma and the other to H. diffusa. All four collections 

 have been examined by the writer and it has become evident that 

 they belong to a single species. This conclusion was reached after 

 measuring accurately 100 spores from each specimen and plotting 

 curves which coincide. A wide range in spore lengths, 26 to 40 /x, 

 was observed. The specimens agree with material collected by 

 Langlois in Louisiana and distributed (Ellis & Everh., Fungi 

 Columbiani, No. 1035) under the name of Herpotrichia diffusa 

 var. rhodomphala. The Porto Rican material, however, is re- 

 ferred here to H. albidostoma, the type of which has been exam- 

 ined at the New York Botanical Garden. 



Material examined: 



On shells and debris of Cocos nucifera L. Herbarium Insular 

 Experiment Station (Stevenson), No. 2626, Espinosa, Mar. 6, 

 1915; Cornell University Explorations of Porto Rico (Chardon), 

 No. 1230, Mayaguez, July 14, 1920. 



On decaying wood. Herbarium Insular Experiment Station 

 (Stevenson), No. 5586, Rio Piedras, July 4, 1916; Cornell Uni- 

 versity Explorations of Porto Rico (Chardon), No. 959, Coamo, 

 Aug. 26, 1920. 



Xylariaceae 



Hypoxylon annulatum (Schw.) Mont., S3 11. Crypt.: 213. 



This very common species resembles a Rosellinia, since the peri- 

 thecia are sometimes free. Individual perithecia are large, black 

 and bear the papilliform ostiolum at the center of a small disk 



(% is)- 



