1897 | CURRENT LITERATURE 301 
ITEMS OF taxonomic interest are as follows: In their een of 
Welwitsch’s African freshwater algze, Messrs. W. West and G. 
describe three new genera;? Psefhotaxus (Ulotrichacee), 7: ee 
(type of a new family of Conjugate, in which conjugation occurs only between 
specially abstricted cells); and Pyxisfora (Zygnemacez). Bulletin 4 of the 
Division of Agrostology contains a revision of the genus Ixophorus by F. 
Lamson-Scribner; a list of the grasses collected by Dr. Palmer near Aca- 
pulco, Mexico, in 1894-5,among which is a new genus Fourniera (Zoysiex), by 
the same author; some Mexican grasses collected by E. W. Nelson in 1894-5, 
by F. Lamson-Scribner and Jared G. Smith; some American Panicums in 
the Herbarium Berolinense and in the herbarium of Willdenow, by Theo. 
Holm ; native and introduced species of Hordeum and Agropyron, with keys, 
by F. Lamson-Scribner and Jared G. Smith; and miscellaneous notes and 
descriptions of new species, among which ereiass hloa ee is proposed asa 
new generic name for Setaria, which is unt and neither 
Chameraphis nor Ixophorus is available as both are well-defined genera 
and abundantly distinct. Bulletin 6 of the Division of Agrostology gives a 
full aécount of the grasses and forage plants of the otas, by Thomas 
Williams, Mr. P. A. Rydberg, in continuation of his studies of Potentilla,” 
describes four new species. Miss Anna Mary Vail has published notes on 
Parosela © (Dalea), which include descriptions of three new species, besides 
the transfer of specific names. Dr. Charles Mohr has published notes on 
some undescribed and little known plants of the Alabama flora,’* among which 
are new species of Sagittaria and Oldenlandia. Mr. Geo. V. Nash has 
described ® new species of Erianthus, Paspalum, Panicum, Agrostis, and Dan- 
thonia. A new Prunus from Connecticut, P. Gravesit, is described by Mr. 
John K. Small,4 and a new Crataegus from Virginia, C. Vatlie, by Dr. N. L. 
-Britton.3 In the continuation of the account of Welwitsch’s African fresh water 
"© among the numerous new forms of Desmidiacew, W. West and G. S. 
est describe a new genus, /chthyocercus. The February number of the 
Bull. Torr, Bot. Club” contains descriptions of numerous new fungi, chiefly 
from Alabama, by L. M. Underwood; a new Lechea from Maine, by E.P 
Bicknell ; a new violet of the Atlantic coast and a | new eexatiinie by N. me 
?Jour Bot. 35+ 33-42. 1897. 
_ © Bull. Torr. Bot. Club 24: 1-13. pis. 287, — ice 
5 -™ Bull, Torr. Bot. Club 24: 14-18. 1897. 
® Bull. Torr. Bot. Club 24: 19-28. pls. se a 1897. 
Bull. Torr. Bot. ‘Club 24: 37-44. 1897. ieee eae 
