1871 PARASITIC FUNGI— STEVENS 21 



to 97 X 18m; spores inordinate. Paraphyses numerous, filiform, gelatinous. 

 Spores continuous, hyaline, 11.14 x 7n, elliptical, obtuse. 

 On Tabernaemontana sp. 



British Guiana: Kartabo, July 22, 1922, 564. 



20. Phyllachora tiliae Stevens n. sp. 

 [Figures 44 to 46.] 

 Spot irregularly circular, 2 to 10 mm. in diameter, tan-colored, bearing 

 numerous, usually 10 to 20, stromata, Stromata epiphyllous, punctiform, 

 circular, black, shining, 1mm. in diameter, often coalescing, usually with a 

 minute central papilla. Appearing below merely as swollen spots. 

 Stromata usually unilocular, in the mesophyll, with thick clypeus above 

 and below. Asci 8-spored, 70 to 83 x 7 to 10 m- Paraphyses numerous, 

 gelatinous. Spores 11 to 14 x 4^, hyaline, continuous, oblong. 

 On unknown species of the Tiliaceae. 



British Guiana: Tumatumari, July 12, 1922, 227. 

 This differs from P. paraguaza Speg. in having more narrow spores: 

 from P. clypeata Theiss. in the character of the clypeus; from P. grewiae in 

 both spores and clypeus. 



21. Phyllachora ulei Wint. 

 Grev., 15:90, 1886. 

 On Dioscorea sp. 



British Guiana: Coverden, August 5, 1922, 746, and August 8, 1922, 

 801: Rockstone, July 17, 1922, 545. 

 The last number is on a species of Dioscora different from that of the 

 others and the locules are larger and fewer in number. 



22. Phyllachora wismarensis Stevens, n. sp. 

 [Figures 47 to 50, 99.] 



Stromata 1 to 3 mm. in diameter, circular or irregular, black, dull, 

 raised, chiefly hypophyllous but occasionally showing from both sides of 

 the leaf, locules usually 1 to 6 showing externally as slightly raised points; 

 occupying the mesophyll and epidermis. Locules 300^ or more in diameter. 

 Asci 126 to 170 X 11 to 14^. Spores 32 to 36 x 7 to 8^, hyaline, continuous, 

 larger at one end, obtuse, tapering toward small end. Paraphyses numer- 

 ous, filiform. Conidia filiform, continuous, hyaline, curved, 14 to 23 x l/t, 

 occurring singly on c'onidiophores within the locules. 



On Ficus sp. 



British Guiana: Demerara-Essequibo R. R., July 15, 1922, 397 (type) 

 and 334. 



Eight species of Phyllachora are recorded on Ficus by Theissen and 

 Sydow. From P. catervaria (Berk.) Sacc. ours differs in size and location 

 of stromata also essentially in shape and size of spores; from P. pseudes 

 Rehm. in shape and size of spores; from P. effigurata Syd., a Brazilian 



