ARTHUR: NEW SPECIES OF UREDINEAE Bye 
III. Telia chiefly hypophyllous accompanying the aecia, gre- 
garious in irregular groups and somewhat confluent or scattered, 
large and irregular, 1-2 mm. across, dark chocolate-brown, 
pulverulent, the membranous epidermis soon ruptured but usually 
partly remaining and conspicuous; teliospores oblong, 18-24 by 
32-38 wu, rounded above, rounded or paler and more or less nar- 
rowed below, considerably constricted but usually not separating 
at septum, the two cells of same size and shape or the lower one 
smaller and narrower; wall dark chestnut-brown or paler in lower 
cell, uniformly thin, 1-2 u thick, closely and evenly verrucose; 
pedicel colorless, short, rarely longer than lower cell, fragile; 
mesospores not uncommon. 
On Anemone stenophylla Poepp., Tucson Hills, Arizona, Febru- 
ary 29, 1920, H. W. Thurston, communicated by L. N. Goodding 81. 
This genus is characterized as it was intended to characterize 
the genus Lysospora, when that genus was founded in 1906 
(Résult. Sci. Congr. Bot. Vienne 340). But the type collection 
for that genus was Sydow’s Uredineen 216, which consisted of a 
mixture on the same leaves of aecia of the heteroecious Tranzschelia 
punctata (Pers.) Arth., and telia of the short cycle Puccinia singu- 
laris Magn., which were inadvertantly assumed to be genetically 
related. The genus Lysospora, therefore, becomes a synonym of 
Tranzschelia, and a new name is supplied for the genus that was 
in mind in 1906, but for which no representative was known 
until the present collection came to hand. 
The species forms one of the series of four correlated species 
of which (1) Tranzschelia punctata, the plum rust, with a full 
spored cycle is the heteroecious form; (2) T. cohaesa (Long) 
Arth., also with a full spored cycle is the autoecious form; (3) 
L. tucsonensis, another long cycle form like the last but with the 
uredinia omitted from the cycle; and (4) Polythelis fusca (Pers.) 
Arth., the short cycle form with only pycnia and telia. The 
systematic position of these four forms depends upon the views 
taken of their evolution and the most serviceable method of 
representing such relationship taxonomically. With slight modi- 
fication in the description the four species could be combined into 
one, having four forms of expression. The author, however, while 
believing that they are closely related, and but cyclic modifications 
of one original form, has found that convenience of study and a 
general clarity of comprehension warrants their separation under 
