322 Pflanzenkrankheiten. — Bacteriologie. — BrjT-ophyten. 



sion of the physiography and soils, climatology, crop and native 

 Vegetation is followed by a discussion of the relation of diseases to 

 envMronmental factors. Then the diseases found are classified accor- 

 ding to the host plants concerned as follows: Diseases of fruit trees^ 

 of small fruits, oi truck crops, of oereals, of forage crops, of wild 

 and dilti vated grasses, of fiber plants, of trees and shrubs, of or- 

 namental plants, of wild plants. 



A bibliography of fifty-one titles is included which bears largely 

 upon earlier work on the fungi of the same region. The plates and 

 figures depict many macroscopic and detailed characters of some 

 of the diseases noted in the text. R. J. Pool. 



Hedgcock, G. G. and W. H. Long. Preliminary notes on 

 three rots of the Juniper. (Mycologia IV. p. 64-65. 1912. j 



Three rots caused by the species of Fomes are briefly noted in 

 this paper. White rot, caused by F. junipevUius ; yellow rot, caused 

 b}^ F. eavlei; and stringy brown rot, caused by F. texanus (Murrill) 

 Hedgc. and Long are the rots considered. The characteristics and 

 distribution of the last two rots are here given for the first time, 

 but white rot has been previously noted. Descriptions of the rots 

 and of the fruiting bodies of the fungi are included. Six figures. 



R. J. Pool. 



Lewis, I. M., A black knot disease of Diantheva amevicanaX^. 

 (Mycologia IV. p. 66-70. 1912.) 



The water willow has been found to be diseased b}'- an organism 

 which Lewis has named Bagniesiella Diantherae sp nov. This paper 

 contains a discussion of the Symptoms of the disease, etiolog}'- and 

 effect on the host, and a technical description of the causal organism. 

 The disease is a hypertrophy of the internodes, developing in the 

 outer tissues of the stem eventually breaking out along longitudinal 

 tissures and exposing the fungus as a smooth grayish surface over 

 a dark background of compact tissue. The morphology of the disease 

 and of the fungus is nicely pictured on four plates with three 

 microphotographs. R. J. Pool. 



Sasaki, F. und J. Otsuka. Experimentelle Untersuchungen 

 über die Schwefelwasserstoffentwicklung von Bakterien. 

 (Biochem. Zeitschr. XXXIX. p. 208—215. 1912.) 



Die untersuchten Bakterien {Coli commune, Typhus, Paratyphus 

 A und B, Proteus vulgaris, Vibrio cholerae u.a.) entwickeln aus 

 Cystin Schwefelwasserstoff. Fluorescenz-, Pyrocyaneus- und Staphy- 

 lokokken- Arten dagegen besitzen diese Fähigkeit nicht. Mercaptan- 

 bildung konnte bei der Reinkultur von Bakterien mit Cystin nie- 

 mals wahrgenommen werden. 



Staphylokokkenarten können mit Hilfe von elementarem Schwe- 

 fel Schwefelwasserstoff erzeugen. Das Bakterieneiweiss spielt bei 

 der Schwefelwasserstoffentwicklung keine Rolle. Aus Taurin ver- 

 mögen Bakterien ebensowenig Schwefelwasserstoff zu entwickeln 

 wie aus Sulfaten. O. Damm. 



Britton, E. G., Leucodontopsis Cardot, (The Br3'^o]ogist. XV. p. 

 26—28. textfig. March 9, 1912.) 



The genus Leucodontopsis was founded by Cardot in 1893 



