UREDINALES OF GUATEMALA 
533 
A long-cycle species, for which the primary stage is not known. 
Only uredinia have been taken in North America up to the present 
time. 
• 
2(57- PucciNiA GNAPHALIATA (Schwein.) Arth. & Bisby (on Car- 
duaceae). 
Gnaphalium sp., Guatemala City, Dec. 20, 1916, I, 610; Antigua, 
Dept. Sacatepequez, Dec. 28, 1916, I, ^55. 
A widespread, long-cycle species, having no uredinia, and not 
before reported south of Mexico. It is usually listed under the synon- 
ymous name P. investita Schwein. 
208. PucciNiA Melantherae P. Henn. (on Carduaceae). 
Melanthera nivea (L.) Small, Antigua, 5300 feet alt.. Dept. Sacate- 
pequez, Jan. II, 1915, ii. III, 6q. 
This long-cycle rust is now first reported from North America. 
A collection by E. Ule, from Brazil, 1885, is issued in Rab.-Paz. Fung; 
Europaei It probably possesses pycnia and aecia, but they 
have not yet been seen. 
209. Puccinia cornuta Jacks. & Holw. sp. no v. (on Carduaceae). 
Notoptera brevipes (Robinson) Blake, Guatemala City, Feb. 15, 
1916, O, I, III, 4gj ; same, Feb. 8, 1917, O, I, III, 846 (type). 
Pycnia mostly epiphyllous, along the veins on yellowish areas, 
conspicuous, dark brown, subepidermal, globoid, 75-100 fx in diameter. 
Aecia hypophyllous along the veins, scattered on yellowish areas 
10-15 mm. across, long cylindric and slightly curved, o.i mm. in 
diameter, 2-3 mm. long, soon breaking up into cylindrical fragments; 
peridium dirty brown, dehiscent by fragmentation; peridial cells 
light cinnamon-brown, narrowly rhomboidal, 7-10 by 42-55 /a, some- 
what overlapping, the wall 2 /x thick; aeciospores angularly globoid or 
oblong, 15-26 by 26-40 fx; wall yellowish to pale golden-brown, thin, 
I fx, thicker above up to 7 /jl, rather coarsely and closely verrucose 
above, smooth below. 
Telia mostly hypophyllous, arising from the veins and following 
the aecia on the same discolored areas, giving a dendritic appearance, 
0.2-0.5 mm. across, early naked, prominent, chocolate-brown or black- 
ish, ruptured epidermis inconspicuous; teliospores ellipsoid, 23-26 
by 32-40 fjL, rounded at both ends, slightly or not constricted at sep- 
tum; wall dark chestnut-brown, 2.5-3 M thick, closely and prominently 
verrucose; pedicel colorless, twice to thrice length of spore. 
A conspicuous rust of most unusual appearance. The remarkably 
long, brown aecia look like those of some Gymnosporangium, but show 
no tendency to slit longitudinally. At first sight they seem like ex- 
