78 THE AMERICAN NATURALIST. [VoL. XXXVI. 
A monograph of the genus Sorbus, by Hedlund, is reprinted from 
Vol. XXXV of the A. Svenska Vetenskaps-Akademiens Handlingar. 
The chemistry of the bark of Rodinia pseudacacia, by Power, and 
the anatomy of the bark of the same species, by Perrédés, form the 
subject of Nos. 20 and 21 of the Publications of the Wellcome Chemical 
Research Laboratories of London. A paper by von Schrenk, on 
the decay of the wood of the same tree, induced by Polyporus 
rimosus, has been separately printed from the Zwe//tà Report of the 
Missouri Botanical Club. 
Dr. Heyl, of Darmstadt, has distributed a paper, “Ueber das 
Vorkommen von Alkaloiden und Saponinen in Cacteen,” from the 
June Heft of the Archiv der Pharmazie. Pilocereus sargentianus, 
Cereus pecten-aboriginum, and C. gummosus were studied. 
Professor Hume publishes an interesting account of Citrus decu- 
mana as Bulletin 58 of the Florida Experiment Station. 
Aligera patelliformis and Collinsia breviflora, from California, are 
described in Zhe West American Scientist for August, by Suksdorf. 
Agave langlasset is the name applied by André, in the Revue 
Horticole for August, to a species of Manfreda from the Pacific slope 
of Mexico. 
Professor Nelson publishes an economic treatise on the species of 
Bromus occurring in Wyoming, in Buletin No. 46 of the Wyoming 
Experiment Station. 
In a paper published as No. 3 of the current volume of Proceedings 
of the California Academy of Sciences Professor Peirce discusses the 
curious etiolated suckers which are sometimes produced by Seguoia 
sempervirens, 
Separates of a paper on hybrid conifers, by Dr. Masters, have 
been distributed from the Journal of the Royal Horticultural Society. 
Dr. E. F. Smith publishes an extended account of the cultural 
characters of four species of Pseudomonas of economic importance, 
in Bulletin No. 28 of the Division of Vegetable Ph ystology and 
Pathology of the United States. Department of Agriculture. 
In a paper reprinted from the Proceedings of the Indiana Academy 
of Science for 1900, Professor Arthur reaches the conclusion that the 
l "eedanapple " fungi, usually known by the generic name Gymno- 

Paes 
ROI ee ue 
unc 
gium, should really be called Tremella, and he consequently 



