62 : BOTANICAL GAZETTE [JANUARY 
This is a common fern rust in its uredinial stage throughout tropical 
America on many genera of ferns. It has been reported from Porto Rico on 
the first named host, but the second host is a new record. The teliospores 
have recently come to light on a collection from Brazil of Lygodium poly- 
morphum (Cav.) H.B.K. in the National Herbarium. I am indebted to Mr. 
W. R. MAxon for the opportunity of studying this interesting material, and 
also for his kindness in deter- 
mining the ferns mentioned in 
this paper. The genus Desmella 
possesses by far the most primi- 
tive characters of Any rusts 
known in the family Aecidiaceae 
(Pucciniaceae), and consequently 
its members have unusual interest 
for the student of Uredinalean 
evolution. 
13. UROMYCES COLUM- 
BIANUS Mayor, Mém. Soc. 
Neuch. 5:467. 1913.—On 
Melanthera aspera (Jacq.) 
Steud., Manzanilla Beach, 
1913, II, Thaxter 33; Mar- 
aval Valley, 1913, 1, U, 
Thaxter 34. 
14. UROMYCES JAMAICEN- 
sis Vesterg. Ark. Bot. 
Stockh. 4'5:33. 1905.—On 
Bauhinia Pauletia Pers., 
St. Anns Valley, March- 
Fic. 2.—Leaf of Pithecolobium latifolium April 1913, Thaxter 20a; La 
showing groups of sori of Maravalia pallida, . ‘ 
Seiva Valley, April-May 
nearly natural size. 
1913, Thaxter 2ob. 
A short cycle species known heretofore only from the North American 
West Indies and Mexico 
} 
| 
15. UroMYCES WULFFIAE-STENOGLOSSAE Diet. Ann. Myc. 
6:96. 1908.—On Wulffia baccata (L.f.) Kuntze, St. Anns Valley, 
1913, III, Thaxter 35; La Seiva Valley, 1913, III, Thaxter 36. 
16. Pucctnta Acnist1 Arth. N.A.F. 471.—On Acnistus arbor- 
escens Schlecht., Maraval Valley, 1913, I, Thaxter 23. 
