524 
J. C. ARTHUR 
In the collection from Quezaltenango, no. 7J2, the telia are about 
equally abundant on both surfaces of the leaf and the teliospores 
have shorter pedicels than in the other collections. The species is 
nearest to P. idonea. 
181. PucciNiA RATA Jacks. & Holw. (on Carduaceae). 
Vernonia leiocarpa DC, Guatemala City, Feb. 13, 1916, ii, III, 
4go\ same, Feb. 15, 19 16, II, III, 495a, intermixed with P. 
notha; same, March 17, 19 16, II, III, S^Sj intermixed with 
P. notha; Mendez, Dept. Guatemala, Feb. 13, 1917, III, 
860. 
A species readily separable from others at present known on Ver- 
nonia by the paraphysate uredinial sori and tuberculate teliospores. 
On some leaves it is accompanied by P. notha, from which it may be 
distinguished by the position on the under surface of the leaf, the 
paraphysate sori, the dark-colored urediniospores and tuberculate 
teliospores. No aecia have yet been found. The species is known 
only from Guatemala. 
182. PucciNiA IDONEA Jacks. & Holw. (on Carduaceae). 
Vernonia triflosculosa H.B.K., Chinautla, Dept. Guatemala, Feb. 
12, 1916, ii, III, 481] Escuintla, Feb. 17, 1916, II, iii, 498; 
same, II, III, 4gg\ Panajachel, Dept. Solola, Jan. 3, 1917, ii, 
III, 670. 
The type selected for this species was collected in Costa Rica, 
on Vernonia triflosculosa H.B.K., at San Jose, Jan. 18, 1916, by E. W. 
D. Holway 445. No pycnia were found in either the Costa Rican or 
Guatemalan collections, and the nature of the complete life cycle 
remains uncertain. The species is similar to P. notha, but has smaller 
and narrower urediniospores, with hemispherical and closely set 
projections on the teliospores. 
183. PucciNiA PRAEALTA Jacks. & Holw. (on Carduaceae). 
Vernonia triflosculosa H.B.K., Mazatenango, Dept. Suchitepequez, 
Feb. 21, 1916, II, III, 5/0. 
A very distinct species for which the aecia are not known, separable 
from all others on the genus Vernonia by the very deep-seated and 
strictly epiphyllous sori. The gross appearance is that of a micro- 
form. It occurs also in Costa Rica. 
