496 Fungi) Bacteria und Pathologie. 



Anonymus. Diseased Evergood Potatoes (Solanum tu- 

 berosum). (Journal of the Board of Agriculture. XIII. Aug. 

 1905. p. 294— 29ö. 1 fig.) 



Records a new disease occurring in the variety of Potato known 

 as j^Evergood". 



Experiments showed that the primary cause of the disease is due 

 to the very excessive developtnent of lenticel-tissue in the variety in 

 question. The dead cells situated over each lenticel favour the attacks 

 of various kinds of fungi. The fungi, though they cannot gain entrance 

 into the tuber through the unbroken periderm, are said to infect the 

 lenticeltissue and caused disease. A. D. Cotton (Kew). 



Blackman, V. H., Congo red as a stain for üredineae. 

 (New Phytologist. IV. July 1905. p. 173—174.) 



Congo-Red in 1"/« watery Solution is recommended for staining the 

 hyphae of Uredineae, with this stain the cell-walls of the fungi are 

 coloured bright red^ while the host cells reniain usually untouched or 

 only take the stain very hightly. Material fixed in alcohol or acetic 

 alcohol stains most effectively ; it also works well after fixing flinds which 

 contain chromic acid only. The rapidity of the stain and the density of 

 result are increased by the addition of a few drops of ammonia to the 

 Solution. The stain fades quickly in ordinary xylol-canada-balsam, but 

 keeps wel in xylol-dammar and in gum-thus. A. D. Cotton (Kew). 



Blackman, V. H. and H. C. I. Fräser, Fertilization in 

 Sphaerotheca. (Ann. of Bot. XIX. 1905. p. 567— 569. 1 fig.) 



A Short note dealing with Sphaerotheca piimuli Burr. 



The authors confirm the results of Harper, and show that the 

 oogonium^ after fertilization, by the entrance of the antheridial nucleus, 

 gives rise to a short brauch (the ascogenous hypha) the penultimate cell 

 of which becomes the young ascus. 



It is suggested that the most satisfactory homology of the parts 

 of the perithecium in Sphaerotheca is to regard the oogonium as a 

 uninucleate ascogonium, which, after fertilization, develops directly by 

 division into a row of cells i. e. into a single ascogenous hypha, of 

 which the usual penultimate cell becomes the ascus. This row of cells 

 cannot be compared to the „scolecite'' of Ascoboliis, for that structure is 

 not a product of fertilization. A. D. Cotton (Kew). 



Butler, E. J., Some Indian Forest Fungi. Parts II, III 

 and IV. (The Indian Forester. XXXI. 1905. Oct. p. 548— 556. 

 Nov. p. 611—617. Dec. p. 670—679.) 



Part II (p. 548—556) deals with Gyinnosporangium Cunninghamia- 

 num Barclay and Chrysomyxa himalense Barclay. The Suggestion of 

 Barclay 's that the latter species is autoecious is rendered highly 

 probable by the authors discovery of both aecidial and teleutospore 

 stages on Rhododendron campanulatiim. 



In Part III (p. 611 — 617) some of the more important rusts on Conifers 

 are described and figured, these include Peridermiiun Thomsoni Berk., 

 Barclayella defornians Diet., Peridermitini Piceae Barclay, P. compla- 

 natiim Barclay, P. brevius Barclay, and P. Cedri Barclay. Notes on the 

 Ephedra rust Peridermiiini Ephedrae Cooke are added. 



Part IV (p. 670—679) treats of the Indian rusts on Berber is. 

 Two new species are added to the list of those already known. Aecidiuni 

 montanum Butl. on B hyceiini, B. coriaria, and B. aristata. Aecidinm 

 droogensis on B. aristata. Füll diagnoses are given. The curious 

 genus Gambleola cornuta Massee is also referred to. 



A. D. Cotton (Kew). 



