Stevens & Dalbey: New Porto Rican Fungi 



9 



cussion as to spore size and shape except the one above named. 

 With this one, agreement is quite satisfactory with exception of 

 perithecium size, which in the Porto Rican material is very uni- 

 form and considerably below the dimensions given for M. 

 tyrolensis. 



Stephanoma Wallr. 



Stephanoma Melioliae sp. nov. 



Mycelium hyaline, fine, 0.5-1 /x, crooked, abundant, overgrow- 

 ing the Meliola and the adjacent leaf surface with a close net- 

 work. Conidiophores arising directly from the mycelium, soli- 

 tary or in groups, simple, erect, 17-27 X 3 /i*, often curved at the 

 tip. Conidia of two types: (i) spherical, 5 /x in diameter, hya- 

 line, i-celled, with usually eight straight, stiff spines about 3-4 /x 

 long; (2) small, oblong, 6 X 3 obtuse, continuous, hyaline. 



On Meliola tortuosa Wint. on Piper umhellahim Lares, 484^ 

 (type). 



University of Illinois, 

 Urbana, III. 



Explanation of Plates 

 Plate 2 



Figs. I, 2. Septoriopsis Chamaesyceae, 9445 (type). Sporodochia. 

 Figs. 3, 4. Septoriopsis Piperis, 5792 (type). Sporodochia and spores. 

 Figs. 5, 6. Exosporiiim Leucaenae, 6792 (type). Sporodochia and spores. 

 Fig. 7. Exosporium Leucaenae showing subepidermal development of the 

 sporodochia. 



Plate 3 



Fig. 8. Ramularia Mimosae, 8367 (type). A ckister of conidiophores and 

 conidia. 



Fig. 9. Haplographium portoricense, 8495 (type). (a) Condiophores 

 showing the Penicillium-like branching, {h) Showing origin of conidiophore 

 from mycelium, the mycelium being very fine and colorless and the conidio- 

 phore thick and dark, (c) Conidia from colony on the lower side of the leaf 

 showing different form, mode of branching and size. 



Fig. 10. Microclava Coccolobiae, 8877 (type) . Conidiophores and conidia. 



Fig. II. Wageria portoriceyxsis. Perithecia with coiled, vermiform ap- 

 pendages, 8407 (type). 



Fig. 12. Wageria portoricensis. Mycelium and hypopodia, 8407 (type). 



Fig. 13. Mycosphaerella subastoma. Grouping of perithecia and limita- 

 tion by veins, 8058 (type). 



Fig. 14. Mycosphaerella subastoma. Showing perithecium is subastomal. 



Fig. 15. Mycosphaerella subastoma. An ascus and spore. 



