ARTHUR: NEW SPECIES OF UREDINEAE 115 
Puccinia Cockerelliana is conspicuously different in both gross 
and microscopic appearance from P. Agropyri, which occurs on 
the same and other similar hosts. The aecia are more crowded, 
more robust and more inclined to be bullate; the aeciopsores are 
larger and have much thicker walls. The telia are on the rough 
or morphologically upper side of the leaf and situated between the 
veins, instead of on the smooth side of the leaf or on sheaths and 
stems asin P. Agropyri. The telia are also larger, and become 
normally dehiscent and uncovered after a time. The teliospores 
are very long and slender, and have no enveloping stromal mass, 
as commonly found in strictly subepidermal forms. 
The species is named by Mr. Bethel in recognition of the emi- 
nent services rendered science in many fields by Professor T. D. A. 
Cockerell, of the University of Colorado, Boulder, Colorado, and 
especially to recall his help in studying the flora of Colorado, 
including the rusts and other fungi. 
Puccinia inclita sp. nov. 
II. Uredinia amphigenous, tardily naked, brownish-yellow; 
urediniospores globoid or ellipsoid, 22-26 by 24-32 #; wall pale 
yellow or brownish-yellow, thin, I-2 u, coarsely and sparsely 
echinulate with elongated and sharply pointed projections, the 
pores obscure, doubtless 3 and approximately equatorial. 
III. Telia similar to the uredinia, chocolate-brown; teliospores 
broadly ellipsoid or oblong, 26-29 by 35-40 #, rounded at both 
ends, very slightly or not constricted at septum, often with meso- 
spores intermixed, 23-27 by 26-29 »; wall chestnut-brown, 2.5- 
3.5 « thick in upper cell and somewhat thinner in lower cell, 
thicker above, 3-6 u and often slightly lighter in color, smooth; 
pedicel golden-brown or paler, the diameter uniform, about one 
and one half times length of spore. 
On Ichnanthus pallens (Sw.) Munro, Mayagiez, Porto Rico, 
March 2, 1916, II, Whetzel & Olive 396; El Yunque, Porto Rico, 
April 12, 1916, II, II], Whetzel & Olive 397 (type). 
On Oplismenus hirtellus (L.) R. & S., Las Marias, Porto Rico, 
July 10, 1915, Il, F. L. Stevens 8118. 
The striking appearance of the urediniospores with their 
prominent echinulation caused the first collection studied, that 
by Professor Stevens on Oplismenus, to be referred to the South 
American Uredo Olyrae P. Henn. (see Mycologia 8: 21. 1916), but 
