72 Pflanzenkrankheiten. — Bacteriologie. — Floristik etc. 



usually attacks that portion of it near the ground level. After one 

 or several seasons the stem is ringed and the bush dies, though 

 this is often preceded by the death of one or more öf the branches. — 

 When it is the young shoots that are attacked, they are seriously 

 weakened or killed outright. The name „die-back" is derived from 

 this form of the disease. — The leaf-attack originates at the mar- 

 gins of the leaves where a yellowish, finally ashy-grey, coloration 

 is noticeable. The injury may remain restricted to the margin , or, 

 if climatic conditions are suitable, the fungus may extend over the 

 greater part of the leaf. Premature defoliation results. The fourth 

 type of attack that of the berries may under certain conditions 

 assume serious proportions. The Botrytis spores from young twigs 

 or main branches alight on the green berries, and infect them, 

 which causes decay and fa.lling off. 



Spraying is not advised except in bad cases. Prompt removal 

 of dead and dying branches is efficacious, and where the disease 

 is severe and widespread, in addition to this a copper sulphate 

 spray before the leaves unfold and a Bordeaux mixture spray as 

 soon as the fruits are set is recommended. A. D. Cotton (Kew,/. 



Potter, M. C. , Bacteria in their rclation to Plant Patho- 

 logy. (Trans, british mycoiogical Society Vol. III. Part 3. Season 

 1909. 4 pl. publ. 1910.) 



The presidential address for 1909. An historical summury of 

 work on bacterial diseases of plants, together with remarks on the 

 physiological aspect of the subject, and, on problems still requiring 

 investigation. A list of well-established bacterial diseases is given, 

 and also a bibliography including some 70 papers. 



A. D. Cotton (Kew). 



Eimer, A. D. E., A decade ofnew plants. (Leaflets of Philip- 

 pine Bot. II. p. 677—688. Aug. 8, 1910.) 



Leucosyke magallanensis, Macaranga ISohlei, Capparis Copelandü, 

 Wikstroetnia linearifolia, Sterculia huniüis, Dedea apoeiise, Hiptage 

 cebuensis, Clerodendron Willianisii, Vernonia ßavescens and V. apoense. 



Trelease. 



Eimer, A. D. E., A new genus and new species of Legumi- 

 nosae. (Leaflets of Philippine Bot. IL p. 689—701. Aug. 31, 1910.) 



Whltfordia, n. gen., with W. scandens, Bauhinia Hallieriana, 

 Albissia magallanensis, Pithecolohium apoense, Gledüschia Copelandü, 

 Strongylodon mindanaensis, Spatholobus apoensis, Dalbergia ferruginea 

 daronensis and D. davaoensis. Trelease. 



Eimer, A. D. E., Myrsinaceae from Mount Apo. (Leaflets of 

 Philippine Bot. II. p. 659—675. Aug. 5, 1910.) 



Contains as new: Ardisia sibulanensis, A. apoensis, A. fragrans, 

 A. Clemeyitis, Maesa platyphylla , Rapanea apoensis, R. fastigiata, R. 

 mindanensis, R. venosus, and Discocalyx mindanaensis. Trelease. 



Greene, E. L., Miscellaneous specific types. III. (Leaflets 

 of bot. Obs. II. p. 105-112. Oct. 6, 1910.) 



Abronia latiusada, Apocynum abdituni, Batrachiitm iisneoides, 



