306 BOTANICAL GAZETTE [APRIL 
21,1917, I, II, II], Holway 759; Quezaltenango, January 16, 1917, I, II, II, 
Holway 732; V. Shannoni Coulter: (?), Quezaltenango, January 31, 1917, 
Holway 814. 
n only from the above mentioned collections from Guatemala. As 
previously noted (cf. 16), this species is often accompanied on the same leaves 
with P. rata, from which it differs in well marked characters. It is closely 
related to P. idonea (cf. 17) and perhaps to P. egregia (cf. 19). In the Quezal- 
tenango collection (732) the teliospores have much shorter pedicels than in the 
other collections, and the sori are equally abundant on both surfaces of the leaf, 
instead of being chiefly epiphyllous as in all the other collections examined. 
19. PUCCINIA EGREGIA Arth. Bot. GAz. 40:204. 1905. 
II. Uredinia not seen; urediniospores from telial sori globoid 
or obovoid, 23-26 by 24-28 yu; wall golden yellow, medium thick, 
I.5-2.5, moderately echinulate; pores obscure, apparently 3 
equatorial. 
III. Telia amphigenous, scattered, round, o.2-0.5 mm. across, 
early naked, pulvinate, becoming somewhat pulverulent, chocolate 
brown, ruptured epidermis inconspicuous; teliospores broadly 
ellipsoid, 26-30 by 35-45 u, rounded at both ends, not constricted 
at septum; wall chestnut brown, very thick, 4-6 u, very slightly 
thickened at apex and over pore of lower cell, the latter placed near 
the pedicel, uniformly coarsely and prominently verrucose with 
conical and well separated papillae; pedicel slender, 4-6 u thick, 
once to twice the length of the spore or occasionally longer, wall 
thin, smooth, colorless. 
On Vernonia uniflora Schz. Bip. 
Known only from a single collection, obtained from a phanerogam’c 
specimen in the herbarium of the New York Botanical Garden, on V. uniflora, 
collected at Oaxaca, Mexico, December 29, 1895, by Seler (1739): The 
material is very meager and admits of but incomplete description. It is, 
perhaps, very closely related to P. notha (cf. 18), from which it differs in the 
somewhat more prominent, very sparsely distributed, rather more sharply 
pointed markings on the teliospore wall. The urediniospore wall is golden 
yellow instead of colorless, as in P. notha. 
20. Puccinia praealta Jackson and Holway, sp. nov. 
O and [. Pycnia and aecia unknown. 
II. Uredinia epiphyllous, densely gregarious and often confluent 
on irregular spots, o.5~2 mm. across, bullate, o.2-o.4 mm. across, 
long covered by the overarching and conspicuous epidermis, deep 
