1921] CURRENT LITERATURE 241 
ARTHUR,’ in his twelfth paper describing new species of Uredineae, has 
published 19 new species, 12 of which are under Aecidium. In addition, 
there are several new combinations and new names. 
Hitcucock” has published revisions of the four genera of Paniceae: 
Isachne (8 spp.), Oplismenus (4 spp.), Echinochloa (7 spp.), and Chaetochloa 
(26 spp.). Full synonymy, often very extensive, and distribution are given 
in addition to the detailed descriptions. Although no new species are described, 
there are many transfers. 
STANDLEY" has begun the publication of an account of the trees and shrubs 
of Mexico, the first paper extending from Gleicheniaceae to Betulaceae, cer- 
tain families being contributed by specialists. In addition to a general 
explanatory introduction, there is an interesting history of botanical red 
tion in Mexico. The Pteridophytes are represented by 28 species, 
TRELEASE, his relationship to the genus is obvious. The next largest genus 
is Piper, with 59 species, the majority of which are credited to the late CASIMIR 
DE CANDOLLE. 
FitzPatrick” has published a detailed monograph of the Coryneliaceae 
(Perisporiales), the majority of whose species occur only in tropical or sub- 
tropical regions. The family includes 14 species, representing 4 genera. 
The largest genus is Corynelia, with 9 species, 5 of which are described as new. 
P. 3 has begun the publication of his studies of the Scrophulariaceae 
of Colombia, based on an exploration of the region for a period of eight months 
during 1917 and 1918. The first paper includes the Antirrhinoideae, in which 
23 genera are recognized, 2 of them being described as new (Monocardia and 
Unanuea). Much the largest genus is Fagelia, with 18 species (10 new), all 
the other 22 genera including 31 species (12 new). 
Burt,™ in his twelfth paper on the Thelephoraceae of North America, 
‘presents the genus Stereum, recognizing 77 species, 12 of which are new. 
9 ArtHuR, J. C., New species of Uredineae. XII. Bull. Torr. Bot. Club 47: 
— ee 
K, A. S., Revisions of North American grasses: Isachne, Oplismenus, 
[iliog, at "Chaetochloa. Contrib. U.S. Nat. Herb. 22:115~208. pls. 25—32. 
Jigs. 21-62. 1920. 
= LEY, .. Trees and — of Mexico (Gleicheniaceae-Betulaceae). 
Contrib. U.S. Nat. Herb. 23:1-169. 19 
13 rr. rpg H. M., nhac of the Coryneliaceae. Mycol. 12:206-267. 
pis. Paes 19 
, F. W., Scrophulariaceae of Colombia. I. Proc. Acad. Nat. Sci. 
Pian neh ners 1920. 
™ Burt, E. i xeon of North America. XII. Ann. Mo. Bot. 
Gard. 7: il aes 
