UREDINALES OF GUATEMALA 
on V. alhicaulis and V. longifolia under the name Argomyces insulanus 
Arth., and is now reported for the first time from the continent. 
179. PucciNiA ERRATiCA Jacks. & Holw. (on Carduaceae). 
Vernonia Schiedeana Less., Guatemala City, Feb. 15, 1916, O, I, II, 
III, 4Q4; same, Feb. 8, 1917, O, I, ii, III, 841; Chinautla, Dept. 
Guatemala, Feb. 12, 1916, O, I, ii, iii, 480; Moran, Dept. 
Amatitlan, Dec. 22, 1916, I, II, iii, 621. 
The aecia of this species were described as Dietelia Vernoniae 
Arth. (Bot. Gaz. 40: 198. 1905), afterward transferred to the genus 
Endophyllum, as E. Vernoniae Arth. (N. Am. Flora 7: 126. 1907), 
from a Mexican specimen thought to be on Vernonia Deppeana, but 
which on careful comparison with the Guatemalan material seems to 
be V. Schiedeana. Re-examination of the type of E. Vernoniae, 
furthermore, reveals a few urediniospores and teliospores which agree 
perfectly with the present material. Further confirmation of the 
long-cycle character of the rust was found on a specimen of V. Schiede- 
ana collected by C. G. Pringle at Cordoba, Mexico, no. 6080, in the 
phanerogamic collection of the New York Botanical Garden, which 
gave all the spore forms, although the teliospores are a little shorter 
and broader than usual, doubtless due to the more mature character 
of the host. 
The species is Eriosporangium-like, and the absence of a peridium 
in the aecia and the deciduous sculpturing of the aeciospores are in 
accordance with the early ideas regarding that genus, as well as the 
thin-walled spores, which germinate upon maturity. A new name 
has been chosen for this species, owing to the priority of the very dis- 
similar Puccinia Vernoniae Schw., founded in 1832. 
180. Puccinia notha Jacks. & Holw. (on Carduaceae). 
Vernonia leiocarpa DC, San Rafael, Dept. Guatemala, Jan. 7, 
1915, III, 21] Solola, 7000 feet alt., Jan. 28, 1915, I, II, III, 148; 
Guatemala City, Feb. 15, 1916, III, 4^5, intermixed with an- 
other species; March 17, 1916, III, 58sa, being intermixed 
with, and separated from the type collection of P. rata] Volcan 
de Agua, Dept. Sacatepequez, March 4, 1916, III, 550; Quezal- 
tenango, Jan. 16, 1917, I, II, III, 732] Huehuetenango, Jan. 21, 
1917, I, II, III, 759. 
Vernonia Shannoni Coult. (?), Quezaltenango, Jan. 31, 1917, III, 
814. 
