Fungi, Bacteria und Pathologie. 385 



Macrosporium solani Cke can be also perpetuated by hybernating 

 mycelium. A. D. Cotton (Kew). 



Massee, George, Revision of the genus Hemileia Berk. (Bul- 

 letin Royal Botanic Gardens Kew. 1906. No 2. 1 plate.) 



A revision of this genus is rendered necessary by the discovery 

 of additional species, and of new phases in its life-history. 



The redescription of the genus by the author is as follows: 

 Hemileia Berh. and Broom (emended). 



1. (Aecidiiim stage). Unknown. 



2. (Uredo stage). Forming effused pulverulent, orange patches 

 on the under surface of living leaves, or on young shoots 

 and fruit; uredospores grouped in small heads or Clusters, 

 produced at the apex of fascicles of hyphae emerging through 

 the stomata, reniform or subglobose, the whole or a portion 

 only of the epispore warted; germ-pores 3 — 5. 



3. (Teleuiospore stage). Teleutospores originating from the 

 centre of the heads of uredospores, after the latter are fully 

 developed, unicellular, broadly ovate, umbonate; germ-pore 

 apical; promycelium simple, 3-4 septate, each septum pro- 

 ducing a single sporidium born on a slender sterigma. 

 Paraphyses present in some species. 



The descriptions of the three previously known species are re- 

 vised and the distribution and hostplants fully dealt with. 



One new species is described, //. indica, occurring on leaves 

 of Macropanax sp. Bombay. A. D. Cotton (Kew). 



Mc. Alpine, D., The rusts of Australia. (Department of Agri- 

 culture, Victoria. Melbourne 1906. Royal. 8". 350 pp. 55 plates 

 [including 366 figures].) 



The number of species of rust fungi recorded in Australia has 

 been during the last fourteen years, more than doubled. The appea- 

 rance therefore of an up-to-date flora of the Uredineae of Australia 

 is of great value especiäliy as it is the work of M c. Alp in e to 

 whom we are in great measure indebted for the increase of our 

 knowledge of the Australian Rusts. 



The first part of the work treats of the general morphology of 

 the Uredineae, and also of questions relating to the rust problems in 

 Australia. 



In the second part, the Australian Rusts are arranged syste- 

 matically with füll descriptions, together with localities and bio- 

 logical notes. 



Some 300 microphotographs illustrate the spore-characters of 

 the different species. In addition to this the more important diseases 

 are figured by plates (some of them coloured) for the benefit of the 

 practical agriculturaHst. A long bibliography is appended together 

 with a glossary and three separate indices. 



The following new species are described : 



Uromyces danthoniae on Danthonia semiannularis. 



U. teniiicutis on Sporobolus asper. 



U. ihelymitrae on T. antennifera. 



U. bicinctus on Acacia fasciciilifera. 



U. hardenbergiae on H. monophylla. 



U. atriplicis on A. semibaccata. 



Botan. Centralbl. Band 102. 1906. 25 



