326 
Mycologia 
Uredo superfidalis (Speg.) Lagerh., a very similar fungus, 
was collected in Jamaica on Anemia hirsuta (L.) Sw., Feb., 1903, 
by L. M. Underwood iiyo. 
Both of these forms on ferns are to be included under the 
Uredinales with considerable doubt, on account of the form of 
the sorus. They need to be studied cytologically and also as to 
their development. 
100. Uredo Stevensiana sp. nov. 
Uredinia chiefly epiphyllous, scattered or in small groups on 
discolored spots, elliptical, small, 0.2-0.5 mm. long, brownish- 
yellow, rather tardily naked by a longitudinal rupture of the 
epidermis ; paraphyses numerous, chiefly peripheral, erect or in- 
curved, clavate, 10-15 by 29-50 |U, the wall colorless, thin, about 
I jj., somewhat thicker above, 2-4 fi ; urediniospores ellipsoid, 
16-21 by 23-27/4; wall pale-yellow or colorless, thin, 1-1.5/4, 
closely and rather prominently echinulate, the pores indistinct. 
On Poaceae: 
Axonophiis compressus (Sw.) Beauv. {Paspalum com- 
pressum Rasp.), Mayagiiez, Jan. 9, 1913, 257, Feb. 8, 
280, April 30, 923. 
Paspalum Humboldtianum Flugge, Cuernavaca, Mex., 
Sept. 28, 1899, E. W. D. Holway 3310 (type). 
Paspalum paniculatum L., Vega Baja, Feb. 22, 573. 
Paspalum (? Helleri Nash), Mayagiiez, April 30, 932. 
Paspalum plicahdum Michx., Mayagiiez, April 30, 943. 
This grass rust differs from Uredo paspalicola, which it closely 
resembles in general appearance, by the presence of numerous 
paraphyses and the somewhat smaller spores. The collections 
made by Dr. Stevens are the only ones seen or known from the 
West Indies, or in fact from any locality, except the one col- 
lected by Holway from central Mexico. The Mexican collection 
is ample, the rust well displayed and free from parasites, and is 
therefore chosen for the type of the species. The Stevens’ col- 
lections are less ample, and the rust much parasitized. But it 
was the varied material supplied by Dr. Stevens that made it 
possible to delimit the species, and to him rightly belongs the 
honor implied in the proposed specific name. 
