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Igor] MEXICAN FUNGI 331 
Puccinia Oaxacana Diet. & Holw. n. sp.—Sori hypophyllous, 
small, scattered, brown; uredospores elliptical or ovate, 23~29 x 
23m, with echinulate epispore ; teleutospores oblong or elliptical, 
rounded at both ends or narrowed to the base, little constricted, 
31-50 X 18-25, smooth, pale brown, slightly thickened at apex, 
germinating at once; pedicel the length of the spore or a little 
longer. 
On Baccharis hirtella DC., Oaxaca, October 18, 1899, no. 3673. Aectdtum 
Jragile, n. sp., occurs with this, but it is doubtful whether it is a stage of the 
Puccinia. 
Puccinia Baccharidis-multiflorae Diet. & Holw., n. sp.—Sori 
hypophyllous, small, scattered; uredosori light chestnut-brown ; 
uredospores obovate, 32-42 X 22-28, yellowish-brown, echinu- 
late, apex with a cucullate thickening (up to 7#) and with 3 
germ-pores, which are covered with a convex hyaline thickening ; 
teleutosori dark brown; teleutospores oblong, apex rounded or 
conical, mostly narrowed to the base, somewhat constricted, 
38-60 X 21-30p; epispore smooth, yellowish-brown, apex strongly 
thickened, and mostly somewhat paler; pedicel short, or up to 
60 long, hyaline, rather fragile. The spores germinate soon 
after maturity. 
On Baccaris multiflora, Amecameca, October 31, 1899, no. 3757: 
CAEOMA PUNCTATO-STRIATUM Diet. & Neg.— On Baccharis, Guadalajara, 
September 16, 1899, no. 3435, with Puccinia Baccharidis, Diet olw. 
Puccinta BaccHaripis Diet & Holw.—On Baccharis, Patzcuaro, 
October 17, 1898, no. 3003; Guadalajara, September 16, 1899, no. 3435- 
Puccinia Baccharidis-hirtellae Diet. & Holw., n. sp.—Sori 
hypophyllous, scattered, punctiform, pulvinate, chestnut-brown ; 
uredospores (mixed with the teleutospores) elliptical to globose, 
or obovate, 22-27 x 19-25, with a thin light brown echinulate 
€pispore ; teleutospores elliptical, rounded at both ends, slightly 
constricted, 32-46 X 20-30n; epispore yellowish-brown, slightly 
Or not at all thickened at apex, finely punctate; pedicel long, 
thin, hyaline. 
On Baccharis hirtella, Amecameca, October 31, 1899, n0. 3756- 
