ARTHUR: NEw sPECIES OF UREDINEAE 571 
On Parthenium Hysterophorus L. (type host), San Andres 
Chalco, State of Mexico, Mex., October 8, 1898, E. W. D. Holway 
3228; P. incanum H.B.K., Kent, Texas, May 7, 1902, S. M. 
Tracy & F. S. Earle 324a; P. argentatum A. Gray, Mazapil, 
State of Zacatecas, Mex., March 27, 1908; Cedros, State of Zaca- 
tecas, Mex., May 22, 1908, F. E. Lloyd. Only the specimens of 
the last two collections show teliospores. Professor Lloyd was 
for some time engaged in scientific and economic study of the 
guayule (Parthenium argentatum), and took considerable pains to 
observe the behavior of the rust. He found that the rust does 
not affect the newer leaves of the season, but appears chiefly 
on the oldest leaves at the base of the season’s growth and con- 
sists mostly of uredinia. The telia, which are rarely abundant, 
are found in the spring on the leaves remaining over from the 
preceding season. Attempts by both Professor Lloyd and the 
writer to germinate the teliospores were in vain. The rust is 
propagated chiefly through the urediniospores. Whether it pos- 
sesses aecia or not is uncertain. 
Puccinia Glaucis sp. nov. 
O. Pycnia not seen, probably obsolete. 
III. Telia amphigenous, solitary or sometimes confluent in 
small groups, I.5-2 mm. across, roundish, 0.5-1 mm. in diameter, 
soon naked, pulvinate, compact, dark brown, becoming gray by 
germination of the spores, ruptured epidermis inconspicuous; telio- 
spores lanceolate-oblong, 13-16 by 43-50u, obtuse at both ends, 
slightly constricted at the septum; wall smooth, golden brown, 
rather thin, 1-1.5u, obtusely thickened at apex, 6-9u; pedicel light 
yellow, slender, one half to once length of spore. 
On Glaux maritima L., Halifax, Nova Scotia, August 16, 1909, 
John Dearness. A well-marked leptoform on a host which here- 
tofore has been reported only for a heteroecious Aecidium. It 
was found in considerable abundance. 
Puccinia Nabali sp. nov. 
O. Pycnia not seen, probably obsolete. _ 
III. Telia chiefly hypophyllous, gregarious, 1n orbicular 
groups on discolored spots 2-5 mm. in diameter, quite soon naked, 
roundish, small, 0.2-0.5 mm. across, often crowded and confluent, 
pulvinate, dark chocolate-brown, ruptured epidermis conspicuous; 
teliospores clavate or spatulate, 16-19 by 39-45, rounded or 
