1917] CURRENT LITERATURE 341 
species.” He recognizes 9 North American species, giving under each the full 
synonymy and citations of exsiccatae. The amount of change is indicated by 
the fact that the revision includes a new species combination, a new variety, 
and 3 new variety combinations. 
Komwzumr” has published some studies of the plants of oriental Asia, 
Sessibiee new species and varieties. Notable among the genera is Morus, of 
which 25 species are enumerated, 4 of which are new. 
MooreE,* in connection with descriptions of numerous new species of 
African Compositae, has established a new genus (Paurolepis) belonging to the 
Vernonieae. 
NAKAI,™ in continuing his studies of the flora of Japan and Korea, has 
described 21 new species, mostly in genera familiar in this country. The 
completed studies will furnish much additional evidence of the close relation- 
‘ship of the Japanese and North American floras. 
Payson, in studying the American perennial scapose species of Draba, 
recognizes 26 species, 14 of which are described as new. The new species are 
from Utah, Nevada, California, Oregon, Idaho, and adjacent Canada. 
Povau,” in concluding his studies of Mucor, has presented a taxonomic 
description of the 18 species investigated. In view of the fact that his experi- 
mental work showed that the species of Mucor are usually plastic organisms, 
varying especially with the substratum, it seemed desirable to attempt a 
standardization of cultural requirements, by investigating as many species as 
possible under the same cultural conditions. The 18 species described were 
studied from uniform, standard bread cultures, and 6 of them are describe 
as new 
Sir"? has described a new genus (Parasyringa) of Oleaceae from China. 
TRANSEAU® has published a list of the algae of Michigan, based chiefly 
upon collections made by him during the summer of 1915, in connection wi 
the M pens se bea es —— by other collections. Since 
number of years, the records 
no work on 
7 Komzumt1, ore Contributiones ad floram Asiae Orientalis. Bot. Mag. 
Tokyo 31:31-41. 
73 Moore, — LeM., Alabastra diversa. XXVII. Jour.- Botany 55:100- 
106. pl. 547. 1917 
™4 NaKal, TAKENOSHIN, Notulae ad plantas Japoniae et Koreae. a Bot. 
Mag. Tokyo 31:97-112. 1917. 
5 Payson, E. B., The perennial scapose Drabas of North America. Amer. Jour. 
Bot. 4:253-267. 1917. 
%6 Povan, ALFRED H. W., A critical study of certain species of Mucor. V. Taxo- 
nomic. Bull. Torr. Bot. Club 44:287-312. pls. 17-20. 1917. 
Suita, W. W., Note on Parasyringa, a new genus of Oleaceae. Trans. and 
Proc. Bot. Soc. Edinburgh 27 1193-96. 1916. 
* Transeav, E. N., The algae of Michigan. Ohio Jour. Sci. 17:217~232. 1917. 
