256 BOTANICAL GAZETTE [march 



located deep in the mesophyll. Asci clavate, .100-115X20/*, 

 8-spored. Spores hyaline, oval, 21-24X8-10/Z, 2-celled, septa 



middle or more 



Quebradillos 



fungu 



erumpent perithecia so closely simulate a rust in appearance that the author 

 was led to place it with the rusts on mere casual examination. 



Sphaeriaceae 



Zignoella algaphila, sp. nov. — Mycelium fine, pale to brown, 

 twining around and penetrating its algal host and turning it brown. 

 Perithecia black, 90X 170-180 /x, variously formed but usually 

 bottle-shaped, broadest a little above the base, with a prominent 

 beak about 24 /z in diameter and with the fibers arranged parallel 

 around the ostiole. Surface coarsely reticulate but not hairy; 

 basal portion appearing as though hairy due to adhering remnants 

 of mycelium. Asci numerous, 8-spored, cylindrical, 71X7 M- 

 Paraphyses fine, threadlike. Spores hyaline, 3-septate, pointed 

 at each end, 17-21 X3. 5 /jl. 



On Cephaleuros virescens on Artocarpus incisa, Mayaguez, 51 (type). 



The parasitic alga when alone on this host is yellow or often nearly colorless, 

 but when invaded by the Zignoella all the colonies take on a dark hue, giving 

 the whole leaf much the appearance of being mildly affected with sooty mold. 

 The genus Zignoella is large and composed mainly of wood-inhabiting sapro- 

 phytes. One is listed on Valsa, one on the thallus of Castagnia, and two species 

 (Z. enormis Pat. and Z. cubensis H. and Pat.) on the alga Stypocaule. These 

 thallus-inhabiting forms, however, are markedly different from the present 



species 



Sphaeropsoidales 







Phyllosticta bonduc, sp. nov. — Spots indefinite, large, starting 

 usually at edge or apex and progressing over the whole leaflet. 

 Pycnidia numerous, black, scattered, ostiolate, about 160-190 M 

 in diameter. Wall about 17/x thick, ostiole large, irregular. 

 Conidiophores simple, hyaline, arising from sides and base of 

 the pycnidium. Conidia hyaline, i-celled, oblong, 2iX4M> some- 

 what irregular in shape. 



On Caesalpinia bonduc, Guanica, 360 (type). 



This fungus is quite distinct from Phyllosticta guanicensis. 



University of Illinois 

 Urbana, Illinois 



