326 THE AMERICAN NATURALIST. [Vor. XXXV. 
A monograph of the Erysiphacez, by Ernest S. Salmon, constitutes 
the ninth volume of Memoirs of the Torrey Botanical Club, bearing : 
the date Oct. 4, 1900. Nine plates of details, containing 175 
figures and a very full bibliography and host-index, with analytical 
keys for each genus, make the book easy to use. 
A preliminary report on diseases of the red cedar caused by 
Polyporus juniperinus and P. carneussby Dr. Von Schrenk, constitutes 
Bulletin No. 2r of the Division of Vegetable Physiology and Pathol- 
ogy of the United States Department of Agriculture. The first of 
these fungi is described as new. The gelatine process-reproductions 
of photographic illustrations of the decayed timber are good examples 
of what may be done in illustration direct from the camera. 
Professor Nelson publishes, as a separate from the tenth Aor? 
of the Wyoming Experiment Station, a preliminary list of the crypto- 
gams of that state, exclusive of Pteridophytes. 
An interesting article on the occurrence of mycorrhiza on Arctic 
plants is reprinted by Hesselman from Bihang till K. Svenska Vet- 
Akad. Handlingar, Vol. XXVI. 
. The structure of the diatom girdle is discussed by Palmer and 
Keeley, in Part II of the current volume of Proceedings of the Phila- 
delphia Academy. 
Five new species and one variety, chiefly in Allium and Artemisia, 
are added to the Colorado flora by Osterhout in the September 
number of the Bulletin of the Torrey Club. 
Part III of Thomas Howell’s Flora of Northwest America, dated 
August 21, 1900, reaches part way through the Composite. 
: A “Botany of Southern California," by Charles Russell Orcutt, 
is begun in the West American Scientist for September. 
A considerable number of new species of North-American plants 
are published by several writers in recent numbers of Zoe. 
Professor F. Manson Bailey’s contributions to the flora of Queens- 
land, New Guinea, etc., continue to appear in current numbers of 
the Queensland Agricultural Journal. 
Dr. Carreiro, the most active botanist now resident in the Azores 
contributes a list of his recent discoveries to the October-November 
number of the Buletin de | "Académie internationale de geogri aphie 
botanique.. 
