732 SUMMARY OF CURRENT RESEARCHES RELATING TO 



the peridium also is bright red. Photographic figures of the plants and 

 the cortex of each are published. 



Hyphomycetes.* — G. Lindau completes his description of the 

 Hyalodidymeai, and begins the third division dealing with the colour- 

 less pluri-septate-spore forms, the Hyalophragmiae. The author remarks 

 on the great difficulty of accurately defining genera that shade into 

 each other such as the parasitic genera Cercosporella and Ramularia. 

 The latter he considers one of the most difficult to understand, and he 

 foresees the splitting of many existing species, as well as the lumping 

 together of others that are considered to differ. 



Fungi of the Mark Brandenburg. | — A complete flora of this 

 district is being issued, and the division " Fungi " has been undertaken 

 by P. Hennings, G. Lindau, P. Lindner, and F. Neger. They begin 

 with the Ascomycetes, and each writer deals with one or more groups. 

 A scientific account is given, with a description of the life-history of 

 each genus, and diagnoses and descriptions of the species that occur in 

 the region. The writers have dealt, in the present part, with 42 genera 

 and 88 species. References and synonymy are fully given, and there 

 are figures to illustrate the genera. 



American Mycology. — Several additions have been made to the 

 fungus-flora in the present issue of the "Journal of Mycology." 

 A. P. Morgan + describes a new species of Chcetosphceiia that grew on old 

 wood. Two new Haplosporellce on dead branches have been found in 

 Kansas by J. B. Ellis and G. Bartholomey.§ A number of new species 

 and new records, mostly of Ustilagineee and Uredinese, are described by 

 P. L. Ricker.|| H. C. Beardsleel gives a short account of the Rhodo- 

 sporas among the Agaricaceas, with notes on the genus Clitopilus. 

 J. M. Bates,** in his " Rust Notes for 1904," gives an account of a 

 Puccinia that occurs on Distichlis, the aecidiuni of which grows on 

 Chenopodium album. He found the secidia also on Cleome serrulata, on 

 Lepidium, and on several other Cruciferas. He proved by experiment 

 the correctness of his observations. Charles Thorn tt offers " Some 

 Suggestions from the Study of Dairy Fungi." He has made cultures of 

 a large number of individuals of Penicillium, and he describes the more 

 constant characters and those that would be of service in diagnosing and 

 classifying the species. 



Diseases of Plants.}:}: — Oskar Kirchner has issued the first part of a 

 new edition of his text-book of the diseases of agricultural plants. His 

 book is intended for cultivators who do not possess scientific knowledge. 

 The host-plants liable to attack are in separate divisions ; the flower and 

 fruit are considered first, and abnormal appearances noted, with the 



* Rabenhorst's Kryptoganien-Flora, Band i. Abt. 8, Lief. 98 (Leipzig, 1905) 

 pp. 385-432. 



t Kryptogamenflora der Mark Brandenburg, Bd. vii., Heft 1, Gebriider Born- 

 traeger (Leipzig, 1905) 1(50 pp. 



\ Journ. of Mycol., ii. (1905) p. 105. § Tom. cit., p. 108. 



II Tom. cit., pp. 111-17. Tf Tom. cit, pp. 109-10 (2 pis.). 



** Tom. cit., pp. 116-17. ft Tom. cit., pp. 117-24. 



XX Die Krank. und Bescbad. unserer landw. Kultur., Eugen Ulmer, Stutgart, 1905, 

 Lief 1, pp. 1-96. 



