472 BOTANICAL GAZETTE [MAY 
uredinia is much in contrast to their entire absence in the Bogota 
material. The habitats are similar, but Bogota is a thousand miles 
or more north of Cuzco. 
20. Puccinia unicolor, sp. nov. (on Carduaceae).—Baccharis 
hemi prionoides Bak., Cuzco, Peru, September 1, II, III, no. 19030. 
Urediniospores intermixed with the teliospores, globoid or 
broadly ellipsoid, 21-23 by 23-26 wu; wall pale yellow, thin, 1-1.5 u, 
closely and rather finely echinulate, the pores indistinct. 
Telia hypophyllous, scattered, round, ©.2-0.5 mm. across, early 
naked, pulvinate, chestnut brown, ruptured epidermis inconspicu- 
ous; teliospores ellipsoid or oblong, 24-34 by 42-48 uw, rounded or 
obtuse at both ends, slightly constricted at septum; wall lemon 
yellow, thick, 2.5—3 wu, thicker above with slight trace of an umbo, 
7-9 m, smooth; pedicel somewhat tinted next the spore, as long as 
the spore, the wall thin, 1 yu. 
The telia often thickly cover the under side of the whole leaf. 
The species is much like that of P. sphenica Arth., on Baccharis 
sordescens DC., from Mexico, but does not agree exactly, and the 
hosts are quite unlike. 
21. Puccinta SpILaNtHIs P. Henn. (on Carduaceae).— 
Spilanthes ciliata H.B.K., Santa Clara, Peru, July 18, II, III, no. 
18727. 
The species has been reported from Brazil and Argentina. It 
differs from P. spilanthicola Mayor, occurring on the same and other 
species of Spilanthes in Colombia, by the larger and paler teliospores, 
and the absence of mesospores. Although the teliospores germinate 
at maturity, yet in the present collection there occur intermixed 
urediniospores, not mentioned in the original description. They 
are globoid or obovoid, 24~29 by 26-34 u, with a cinnamon brown 
wall, 1.5-2 w thick, closely echinulate, and with 4 equatorial pores. 
22. Puccini sp. (on Carduaceae). 
Genus and species undetermined, near Mollendo, Peru, August 
25, II, III, no. 18986; same, O, I, II, III, no. 18987. 
This is a species with smooth, ellipsoid teliospores and globoid, 
2-pored urediniospores, belonging to the subfamily of hosts, 
Heliantheae, but cannot be exactly located. 
23. Aecidium Enceliae, sp. nov. (on Carduaceae).—Encelia 
canescens Cav., vicinity of Arequipa, Peru, August 3, no. 18792. 
