Seaver: Hypocreales of North America 55 



covering of delicate, white hairs so that the whole cluster of 

 plants has a whitish appearance, except the ostiolum which is 

 bare, becoming yellowish with age; hairs about 2 mic. in 

 diameter, usually roughened externally with minute granules 

 but occasionally smooth ; asci cylindrical, 8-spored, 40-50 X 5 

 mic; spores i-seriate, broad-elliptical, hyaline, i-septate, with i 

 oil-drop in each cell, 5-8 X 3-4 mic (pi 5. f. 5)- 



On old fungi, Polyporus, Stereum, and also on rotten wood. 



Type locality: Ohio. 



Distribution : New York to Ohio, Florida and Louisiana. 



Specimens examined: Florida, Calkins; New York, Seaver; 

 Louisiana, Langlois 1213; Ohio, Morgan (type). 



Distinguished by the broadly elliptical spores. 



Two collections of fresh material of this species were made by 

 the writer in the vicinity of New York City, during the autumn 

 of 1906. The specimens collected were on old wood and corre- 

 spond well with the type material of this species. In external 

 appearance the species closely resembles Nectria Rexiana Ellis 

 or Nectria squamulosa Ellis but spore characters are very differ- 

 ent. The spores are similar in form and arrangement to those 

 of Nectria Pezisa (Tode) Fries but are much smaller. 



6. Nectria Rexiana Ellis, Am. Nat. 17: 194. 1883 



Perithecia nearly globose, yellowish, clothed with a dense 

 covering of long, fiexuose, hyaline (white to the naked eye), 

 septate, rough hairs, perithecia 150-200 mic. in diameter; asci 

 cylindrical, 30-40X4-5 mic, 8-spored; spores mostly i-seriate 

 or partially 2-seriate above, minute, cylindrical or allantoid, hya- 

 line, faintly i-septate, 5X2 mic. {pi. 5. /. 6). 



Parasitic on Chondrioderma. 



Type locality: New York. 



Distribution : Maine to New York. 



Specimens examined: New York, Rex (type); Maine, 

 Harvey. 



Distinguished by the comparatively large perithecia and small 

 size of the spores. 



7. Nectria squamulosa Ellis, Bull. Torrey 

 Club 9: 20. 1882 



Perithecia gregarious, minute, 100-125 rn^c. in diameter, light 

 colored (when dry nearly white) with a prominent ostiolum which 



