1918] ARTHUR—UREDINALES 465 
genus Puccinia. Ten years later, however (Hedwigia Beibl. 41: 
112), he placed it under Uropyxis, a genus which he considered well 
separated from Puccinia and Phragmidium by the following group 
of characters: (1) multiple number of germ pores, (2) formation of 
a hygroscopic layer in the wall, (3) inclination toward the produc- 
tion of more than two cells in the spore, these characters all applying 
to the teliospore. 
It was an important advance in recognizing the need of a group 
of characters in delimiting genera among the rusts. Not until 
1905, when the writer presented a classification of the rusts before 
the Vienna Congress, was the principle extended to include char- 
acters from all the stages in the life cycle, and foremost of all from 
the nature of the cycle itself. Unfortunately, such a criterion for 
rust genera is yet too little recognized. 
The combination of characters used to establish the present 
genus is: (1) the short life cycle, (2) subepidermal pycnia, (3) more 
than two germ pores, (4) a hygroscopic layer, (5) a closely verrucose 
cuticle. Characters 1 and 4 ally the genus with Calliospora, the 
correlated short cycle form of Uropyxis; characters 3 and 5 with 
Phragmidium; but in no genus heretofore recognized is the full 
combination of characters to be found. 
The germ pores in this species appear somewhat variable, but 
are usually 5 and approximately equatorial. The surface of the 
spores is moderately and closely verrucose, almost rugose-verrucose. 
The pedicel is fragile, and usually breaks away close to the spore. 
A rather full description of the species is given in Sypow, Monog. 
Ured. 1:843. 
5. Sphenosporea Berberidis Lagerh., sp. nov. (on Berberida- 
ceae).—Berberis glaucescens St. Hil. (?), Tahatanga, Ecuador, Sep- 
tember 18g1, III, G. Lagerheim. 
Uredinia and telia hypophyllous, segregated on somewhat dis- 
colored spots; urediniospores globoid or broadly ellipsoid, 19-22 
by 23-26 u; wall pale cinnamon brown or colorless, 1. 5-2 4 thick, 
moderately echinulate, the pores obscure; teliospores ellipsoid or 
elliptic, 21-24 by 26-32; wall pale cinnamon brown, thin, 1 y, 
slightly thicker above, 1 .5-3 #, smooth; pedicel colorless, as long 
as the spore, fragile, breaking off near the spore. 
