346 The North American Cup-Fungi 



24 /x, terminated abruptly at the base; spores ellipsoid, granular 

 within, 10-12 X 25-30 n, irregularly 2-seriate, hyaline, simple, or 

 1-3-septate; paraphyses enlarged above, reaching a diameter of 

 5—6 fjL. 



On branches of Salix petiolaris, Salix discolor and other species 

 of Salix and Populus. 



Type locality: Europe. 



Distribution: New York to Winnipeg, Washington and 

 Colorado; also in Europe. 



Illustrations: Tul. Fung. Carp. 3: pi. 18, f. 1-11; Gill. 

 Champ. Fr. Discom. pi. 98; E, & P. Nat. Pfl. l^: 247,/. 182. A-C; 

 Massee, Brit. Fungus- Fl. 4: 22,/. 34-35. 



ExsiccATi: Schm. & Kunze, Deuts. Schw. 174 (as Peziza 

 Lecanora); Barth. Fungi Columb. 1918; Brenckle, Fungi Dak. 

 535. 



This species has been placed in various genera and made the 

 type of the genus Ocellaria by Tulasne which genus is usually 

 treated with the Phacidiales. The writer can see no reason for 

 treating it with that group. It has been collected in abundance 

 by the writer in Colorado on some species of willow around 

 Tolland at an altitude of 8,000 to 10,000 feet. 



Through the kindness of John Dearness, the writer has been 

 permitted to examine a part of the type collection of Pezicula 

 eximia Rehm and finds it identical with the above. 



17. Pezicula Populi (Thompson) Seaver, comb. nov. 



Neofabraea Populi Thompson, Mycologia 31: 458. 1939. 



Apothecia thickly gregarious, usually occurring singly, or 

 rarely two or three crowded together, entirely sessile, erumpent 

 but scarcely rising above the surface of the substratum, sur- 

 rounded with the upturned edges of the ruptured outer bark, 

 scarcely exceeding .5 mm. in diameter, dark brownish-black; 

 hymenium concave, or nearly plane, reddish-brown, with a 

 slightly elevated, darker center which gives the hymenium an 

 umbilicate appearance; asci clavate, apparently normally 8- 

 spored but often with only 5 or 6 of the spores developed, reach- 

 ing a length of 80 fx and a diameter of 12 /x; spores 2-seriate 

 above, ellipsoid, usually with two oil-drops, hyaline, 5-6 X 18- 

 20 ju, becoming indistinctly 3-septate; paraphyses enlarged 

 above, hyaline. 



