122 ARTHUR: NEW SPECIES OF UREDINEAE 
cinnamon-brown; paraphyses peripheral, numerous, hyphoid, 
incurved, 10-13 by 29-45 y, the wall pale cinnamon-brown or - 
sometimes colorless, I-1.5 4 thick, frequently thickened 3-5 w on 
moderately echinulate, the pores obscure, probably 4 and equa- 
torial. 
On Bambos vulgaris Schrad., Santiago de las Vegas, Cuba, 
January 29, 1916, J. R. Johnston 424 (type); Maricao, Porto Rico, 
March 15, 1916, Whetzel & Olive 428, 429; Mayagiiez, Porto Rico, 
March 20, 1916, Whetzel & Olive 427. 
The rust produces an abundance of pale yellowish sori on both 
sides of the leaf, but especially beneath, and more or less discolors 
the tissues. It has been referred to Uredo paspalicola (Uredinales 
of Porto Rico, Mycologia 9: 92. 1917; Uredinales of Cuba, 
Mem. Torrey Club 17: 165. 1918), which it much resembles. 
There are a number of bamboo rusts. The material listed here 
has been carefully compared with Puccinia corticioides Berk. & Br. 
(Syd. Ured. 1263), P. Kusanoi Diet. (Syd. Ured. 1239, 1313, 
1373), P. longicornis Pat. & Har. (Syd. Ured. 2314), and one other 
species distributed by Kingo Miyabe as P. Phragmitis, all from 
Japan, and P. Bambusarum (P. Henn.) Arth. from South America, 
as well as P. Arundinariae Schw. from North America, all on 
species of Arundinaria or Bambos (or Bambusa as the generic 
name is often written). It has also been compared with the de- 
scriptions of other species on these hosts. 
Aecidium Clemensae sp. nov. 
OQ. Pycnia epiphyllous chiefly, few, crowded opposite the 
encircling aecia, noticeable, reddish-brown, subepiderma 
I. Aecia hypophyllous, crowded in orbicular groups 3-8 mm. 
across on much larger slightly discolored spots, cupulate or cylin- 
dric, 0.2-0.4 mm. in diameter; peridium revolute, coarsely lacerate; 
peridial cells rhomboidal, 32-47 » long, somewhat overlapping; 
aeciospores angularly globoid or broadly ellipsoid, 19-27 by 24- 
27 u; wall colorless, 1-2 u thick, moderately and closely verrucose. 
On Cissus incisa (Nutt.) Des Moulins, Fort Sill, Oklahoma, 
June 19, 1916, 11931 (type), July 27, 1916, 11931a, both collected 
by Mrs. Joseph Clemens. This aecial rust is undoubtedly heteroe- 
cious. It has some resemblance to the aecia of Puccinia subnitens 
