Chardon : Pyrenomycetes of Porto Rico 



293 



on a single collection made at Mayaguez on Cassia fistula. The 

 writer was fortunate in securing abundant material of the species 

 and, moreover, collecting it on a new host, Cassia grandis. Phylla- 

 chora Cassiae P. Henn. reported from Brazil is very distinct from 

 the Porto Rican species in possessing smaller, unilocular stromata 

 and slightly larger spores. The two collections reported by Ste- 

 venson (36) as P. Cassiae are here referred to P. canafistulae 

 (fig- 23). 



Material examined: 



On Cassia fistula L. Herbarium Insular Experiment Station 

 (Stevenson), No. 3564, Rio Piedras, Dec. 14, 1915; Cornell Uni- 

 versity Explorations of Porto Rico (Chardon), No. 924, Penuelas, 

 July 30, 1920; id. id. (Chardon), No. 926, Penuelas, July 18, 1920. 



On Cassia grandis L. Cornell University Explorations of 

 Porto Rico (Chardon), No. 900, Penuelas, July 18, 1920; id. id. 

 (Chardon), No. 916, Penuelas, July 24, 1920. 



Phyllachora Serjaniicola sp. nov. 



Spots amphigenous, slightly exceeding the stromata, irregular; 

 stromata small, black, shining, 1-4 mm. in diam., visible on both 

 sides of the leaf, occupying the mesophyll, surrounded by a narrow 

 zone of dead host tissue, plurilocular ; locules globose to irregular, 

 180-300 /x in diam.; asci cylindrical, 8-spored, 63-75 x 12-18 fx\ 

 spores uniseriate or else biseriate at the apex, ellipsoidal, hyaline, 

 continuous, 10-13 x 6-8 ^; paraphyses present (fig. 18). 



The species differs from Phyllachora duplex Rehm in having 

 smaller spores and much smaller stromata. A portion of Rehm's 

 type was sent by Doctor L. Romell for examination. 



Material examined: 



On Serjania polyphylla Radlk. Cornell University Explora- 

 tions of Porto Rico (Chardon), No. 923, Penuelas, July 27, 1920 

 (type) ; id. id. (Chardon), No. 896, Penuelas, Aug. 11, 1920. 



Phyllachora Whetzelii sp. nov. 



Spots amphigenous, slightly exceeding the stromata, circular in 

 outline; stromata small, purple-black, dull, circular, 1-1.5 mm. in 

 diam., occupying the mesophyll of the leaf ; very conspicuous on 



