180 Fungi, Bacteria und Pathologie 



Les spores sont plurinucleees, comme dans le genre Empiisa. Les 

 filaments contiennent aussi des noyaux multiples de 2—3 /' avec un 

 corpuscule central fixant fortement l'hematoxyline. On y distingue en 

 outre des granulations , des corpuscules gras et des grains meta- 

 chromatiques. 



Les reactifs colorants semblent indiquer dans la inembrane la 

 presence d'une substance azotee, l'absence de composes pectiques et 

 de cellulose, la localisation de la cailose en des points nettement 

 delimites. 



On rencontre dans les cultures des filaments cloisonnes et ramifies 

 et des kystes analogues aux pseudospores ou gemmes des Mucorinees. 

 Ces aspects se montrent surtout quand les conditions de milieu sont 

 defectueuses. 



L'auteur s'est particulierement Interesse ä la dehiscence des conidies. 

 La membrane qui les separe du support est tres extensible. Dans les 

 conditions artiiicielles qui modifient la tension osmotique, soit dans la 

 spore, soit dans le tube^ eile se bombe, soit dans l'interieur de la spore 

 ä la facon d'une columelle, soit ä l'interieur du pedicelle. Normalement, 

 eile se dedouble en deux lamelies qui se regardent par leur convexite 

 et, en se decollant brusquement, amenent la projection de la conidie. 



Le Delacroixia developpe d'abondants filaments dans les cadavres 

 des Blattes; mais on n'a pas reussi ä contaminer les Insectes vivants. 



Paul Vuillemin. 



Hedgcock, Q. G., Thecrown-gall and hairy-root dis- 

 eases of the apple tree. (Bureau of Plant Industry BuH. 

 90. Pt. 2. p. 1-7. Nov. 1905.) 



This is a circular of Information explaining the diseases which have 

 been classed as crown-gall. The investigations have been carried on 

 upon the galls of the following plants: apple^ pear, raspberry, peach^ 

 almond, grape, rose, and others. The investigations have shown that 

 there are two distinct diseases; the one designated as crown-gall is 

 characterised by a callous-like gall growth following wounds on the root 

 System, the other known as hairy-root is characterised both in seedlings 

 and ingrafted or budded trees by a stunted root system accompanied by 

 an excessive number of small fibrous roots. The two types of disease 

 may occur together but this is not usual. The apple crown-gall has 

 been found to be of two types; a hard cailous form occuring as a result 

 of wounds, and a soft form more common on seedüngs. The attention 

 of nurserymen is called to the desirability of getting extended series of 

 data and calling for aid in collecting this material for further use. 



Perley Spaulding. 



HOLWAY, E. W, D., North American Salvia-msis. (Journal 

 of Mycology. XI. p. 156—158. July 1905.) 



Gives notes and occurrence of the following species: Puccinia 

 verti-septa Tracy and Gall. on Salvia Sessel Benth. and 6". hallotaeflora 

 Benth. which is a typical Diorchidium, P. caulicola Tracy and Gall. on 

 Salvin laiiceolata Willd., P. mitrata Syd. on 10 species ot Salvi, P. in- 

 freqiiens Holway n. sp. on Salvia cinnabarina Wart, and Gal., P. badia 

 Holway n. sp. on Salvia albicans Fernald, 5". chtysantha Wart, and Gal. 

 and 5. sp., P. griseola Lagerh. on Salvia elegans Vahl., and P. nivea 

 Holway n. sp. on Salvia purpurea Gar. Perley Spaulding. 



Lewton-Brain, L, Fungoid diseases of Cotton. (West 

 Indian Bulletin. Vol. VI. 1905. p. 117-128. 



The greater part of the report concerns the obscure „Black Bol " 

 h is 

 I n di es. 



which is the most serious disease of cotton occurring in the West 



