Chardon : Pyrenomycetes of Porto Rico 291 



extends far beyond them ; asci very indistinct, clavate cylindrical, 

 8-spored, 50-64 x 17-24 spores inordinate, continuous, pale 

 yellow, globose to ellipsoidal, 9-12 x 7-8 paraphyses present, 

 profuse (fig. 22). 



Fig. 2. Trabutia Bucidae sp. nov. Cross section of a leaf of Bucida bu- 

 ceras showing a locule covered above with a subcuticular stroma. (Outlined 

 with a camera lucida ; X 125). 



Material examined : 



On Bucida buceras L. Cornell University Explorations of 

 Porto Rico (Chardon), No. 905, Coamo, Aug. 21, 1921 {type). 



Trabutia Guazumae sp. nov. 



? Phyllachora Guazumae P. Henn., Hedwigia 48: 7. 1908. 



Stromata epiphyllous, numerous, black, shining, irregular or 

 occasionally circular, distinctly convex to subcorneal, 1-2 mm. in 

 diam., in rare cases 3-4 mm., surrounded by a discolored zone of 

 dead host tissue .5 mm. across ; locules many, globose, 200-300 fx 

 in diam. ; covered with a well-developed stroma, asci subcylindrical, 

 63-78 x 13-19 [jl; the ascus wall indistinct, spores uniseriate or 

 biseriate in the main body of the ascus, cylindrical, hyaline, con- 

 tinuous, contents uniform when young, becoming distinctly 2- 

 guttulate at maturity; paraphyses present (fig. 20). 



Fig. 3. Trabutia Guazumae sp. nov. Cross section of a leaf of Guazuma 

 ulmifolia showing plurilocular stroma. The stroma is apparently subcuticular. 

 (Outlined with a camera lucida; X 125). 



This form is probably cospecific with Phyllachora Guazumae 

 described by Hennings from Brazil. Unfortunately, he worked 

 with immature material and his description is very incomplete, the 

 spores not being mentioned. In the system of Theissen and 



