32 BOTANICAL GAZETTE [JuLy 
pulverulent; spores globose or ovate, 24-30 by 20~-26y; mem- 
brane thin, brown, with very short spines: teleutosori black ; 
spores elliptical or ovate, rounded at both ends, slightly con- 
stricted, 38-52 by 22-274, smooth, chestnut-brown, hooded at 
apex or rarely with a conical thickening, mostly paler in color; 
pedicel hyaline, longer than the spore, rather firm.—On 7ithonta 
cubifiora, near City of Mexico, Oct.2; 7. tagetifora, Guadalajara, 
et: 12, 
This species is much like P. He/ianthi Schw., but the spores are darker, 
average smaller, and the septum is less thickened at the sides. 
Puccinia Bidentis Diet & Holw., n. sp—Sori mostly hypo- 
phyllous, scattered, small, dark-brown, on faint yellow spots: 
teleutospores partly 2-celled, but mostly 1-celled, the latter 
elliptical, ovate or globose, 19-30 x 17-23; the 2-celled spores 
greatly variable in form and size, elliptical or oblong, rarely 
narrowed to the pedicel, slightly constricted, 24-38 by 15-254, 
chestnut-brown, finely punctate; pedicel firm, mostly longer 
than the spore, colored above.— On Sidens, Cuernavaca, Sept. 23. 
Puccinia Melampodii Diet. & Holw., n. sp—Spots pale yel- 
low or brownish; sori hypophyllous, small, pulvinate, black- 
brown, mostly in small irregular groups: teleutospores oblong 
or fusiform, rounded or narrowed to a conical point at apex, 
narrowed towards the pedicel, moderately constricted, 42-60 by 
15-20, epispore smooth, brown, apex strongly thickened (5- 
10“); pedicel firm, up to 27H long.—On Melampodium, Cuer- 
navaca, Sept. 25. 
Puccinia Encelie Diet. & Holw., n. sp.—Sori hypophyllous, 
scattered, naked: uredosori brown; spores elliptical or globose, 
20-25 by 19-23, brown, echinulate: teleutosori black-brown; 
spores elliptical or obovate, rounded at both ends, very slightly 
constricted, 31-42 by 23-27“; membrane smooth, chestnut- 
brown, apex with a light flat hood about 7p thick; pedicel 
longer than the spore, hyaline, moderately firm—On Encelia 
Mexicana, Cuernavaca, Sept. 25. 
This species is much like P. Helianthi Schw., of which it is perhaps only 
aform. The teleutospores, however, average considerably smaller. 
