346 
Quercus densiflora—Extended Range of. Barclay Hazard (Erythea, 
i. 159, 160). 
Remarks on the Genoa Congress. Otto Kuntze (Erythea, i. 155— 
i 
Report of Botanical Section. (Proc. Rochester Acad. Sci. ii. 176.) 
Among other interesting items, Rhododendron maximum is re- 
ported from Penfield, N. Y.,a station north of its usual habitat. 
Report of the Botanist—Seventh Annual. Charles E. Bessey (Ne- 
braska Sta. Bd. Agric., 1893). 
Notes on and illustrations of the weeds of Nebraska. A pre- 
liminary description of the native and introduced grasses of Ne- 
braska enumerates 154 species, many of them also illustrated. 
 Rudbeckia hirta—Variation in Ray-flowers in. Florence Beckwith 
(Proc. Rochester Acad. Sci. ii. 170, illustrated). 
Saprolegniacee of the United States with Notes on other Spectes.— 
J. E. Humphrey (Trans. Amer. Phil. Soc. Reprint.) 
This monograph of eighty-four pages and seven full quarto 
plates is a valuable contribution to the previously very limited 
knowledge of an obscure but very interesting, important and pe- 
culiar group of Fungi. The subjects of non-sexual reproduction 
and sexual reproduction receive full treatment, the various points 
being brought out with the aid of superior lithographs of the 
stuctures studied. Following the chapter upon occurrence and 
distribution of the Saprolegniacez is the systematic portion. There 
is a key to the genera, and under each genus a key to the species. 
Eleven species, for example, are given of Saprolegnia; S. Tre- 
leaseana being new; fifteen of Achlya, with the following described 
for the first time: A. Americana, A. megasperma and A. papillosa. 
A full bibliography concludes the work. B. Dew. 
Sedum radiatum—Note on. Thomas Howell (Erythea, i. 144). 
Senecio aureus—The Embryo-sac and Embryo of. D. M. Mottier 
(Bot. Gaz. xxiii. 245-253 ; three plates). 
Shrubs of Northeastern America. Charles S. Newhall (G, P. Put 
nam’s Sons, New York, 1893, 8vo, 249 pages, illustrated). 
This is the second of the series planned by the author, for pre- = | 
senting in a popular way handbooks of our native woody plants. 
The first — of the trees, and the third is to preset the vines. 
