302 BOTANICAL GAZETTE [APRIL 
II. Primary uredinia epiphyllous, surrounding the pycnia on 
yellowish hypertrophied spots with purple border, secondary 
scattered, round, small, o.2-0.3 mm. across, soon naked, pale 
cinnamon brown, pulverulent, ruptured epidermis noticeable; 
urediniospores broadly ellipsoid, obovoid, or globoid, 18-26 by 
22-30; wall golden yellow fading to nearly colorless, medium 
thick, 1. 5-3, sparsely and evenly echinulate, pores indistinct, 2-3 
and equatorial. 
III. Telia amphigenous, or often only epiphyllous, scattered, 
round, small, o.2-0.5 mm. across, often confluent, soon na ed, 
chocolate brown, compact and cinereous from germination or 
pulverulent, ruptured epidermis inconspicuous; teliospores elliptical 
or elliptical-obovate, 22-38 by 38-50, rounded above, rounded 
or somewhat narrowed below, slightly or not constricted at septum; 
wall finely to coarsely reticulate-verrucose with irregular, crowded 
sculpturing, golden brown in the germinating form to chocolate 
brown in the pulverulent form, 3-6 u thick, slightly or not thicker 
at apex, 4-10, much thinner at base in the germinating form; 
pedicel colorless, rather slender, 5~9 u thick, once to twice length of 
spore, minutely rugose, or nearly smooth. 
On Vernonia Alamani DC., Amecameca, Mexico (state), October 31, 1899, 
Holway 3754 (type), distributed in Barth. Fungi Columb. 4573; October 39, 
1903, Holway 5190, distributed in Barth. N. A. Ured. 168; Oaxaca, November 
11, 1903, Holway 5379; Patzcuaro, Michoacan, October 13, 1899, Holway 
3631; October 10, 1899, Holway 3602; October 17, 1898, Holway 3105; V- Kar- 
winskiana DC., Las Sedos, Oaxaca, Mexico, October 30, 1894, C. G. Pringle 
6019; V. inition Gleason, Guadalajara, Jalisco, Mexico, October 16, 1889, 
C. G. Pringle 2316; Vernonia sp., Oaxaca, Mexico, October 18, 1899, Holway 
3668, distributed in Barth. N. A. Ured. 1570; Chapala, Mexico, September 19, 
1899, Holway 5459; Cuernavaca, Mexico, September 30, 1899, Holway 3549 
Morelos, Mexico, September 8, Arséne (Field Museum, sheet 386949). 
This remarkable species presents some puzzling features. The teliospores, 
as stated in the description, are of two forms, quite different in general char- 
acters. The thin-walled, lighter colored spores are often found in a germinating 
condition. The thick-walled, darker spores show no evidence of germination. 
All gradations between the extremes of the two forms may be found in the same 
collection and even in the same sorus. It is possible that this species should 
be regarded as indicating a transitional relation between the Argomyces tyPe 
and the usual form. 
