ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 621 



The yearly record of plant diseases * has just been issued by M. 

 Hollrung. He sums up in his journal all that has been published on 

 plant pathology in different countries during- the year 1907. A large 

 part of the work deals with fungal parasites, and these are described by 

 him and the original references given. Chapters on hygiene and thera- 

 peutics add to the completeness of the work. Bibliographies are added 

 after each chapter, and a full index renders the whole easy of reference. 



J. F. Chittenden | finds that Coleosporium Senecionis causes a disease 

 of Cinerarias ; the uredo stage appears in September. Scorching of 

 apple leaves is due to Cladosporium herbarum. Bad cultivation and un- 

 favourable weather render the foliage more liable to attack. Spraying 

 with Bordeaux mixture keeps the fungus in check. 



Mycorhiza Problems 4 — Jaroslav Peklo has made cultures of the 

 fungi forming the mycorhiza of Carpinus and Fagus. Carefully pre- 

 pared material and microtome sections enabled him to see the character 

 of thehyphte. In Carpinus they are somewhat swollen, and push them- 

 selves between the cells of the host. In Fagus he found a hyphal layer 

 rich in material resembling tannin ; outside that was another layer full 

 of what seemed to be glycogen. 



The isolation and cultivation of the fungi presented peculiar diffi- 

 culties, but these were overcome, and Peklo has identified the fungus of 

 Carpinus roots with a Penicillium very similar to P.geophilum Oudem. 

 The mycorhiza of Fagus, he found, was also formed by Penicillium. 

 The swellings on the roots of Alnus were also studied and reproduced by 

 infection cultures. Peklo considers that the organism causing these is 

 akin to Streptothrix, and compares it with Actinomyces. 



Banker, Howard J. — A New Fungus of the Swamp Cedar. 



[The parasite is one of the Hydnacese, Steccherimim Ballonii sp. n.] 



Bull. Torrey Bot. Club, xxxvi. (1909) pp. 341-3 (1 pi.). 



Buller, A. H. R. — The Destruction of Wood by Fungi. 



[An account of what is known on this subject, and of the methods employed 

 for preserving timber from fungoid attacks.] 



Sc. Progr., 1909, pp. 361-78. 



Cruchet, Paul— Contribution a l'Etude de la Flore cryptogamique du Canton 

 du Tessin. 



[List of parasitic fungi.] 



Bull. Soc. Vaud. Sci. Nat., xlv. (1909) pp. 329-39. 



Dietel, Paul — Uredinaceae paraenses. 



[A number of new species are described.] 



Bol. Mus. Goeldi, v. (1909) pp. 262-7. 



Feedinasdses, C, & O. Winge — Phycomycetae, TJstilagineae, Uredineae, Dis- 

 comycetae, Pyrenomycetae, et Fungi Imperfecta 



[The authors add 75 species to the fungi already known from the Danish 

 West Indies ; 19 are new to science.] 



Dansk. Bot. Tidssk., xxix. (1908) pp. 1-5. 

 See also Bot. Centralbl, ex. (1909) pp. 659-60. 



* 



Jahrb. Pflanz.-Krankh., x. (1907). Berlin : Paul Parev (1909) x. and 402 pp. 

 t Journ.Roy. Hort. Soc, xxxiii. (1908) pp. 500-13. 

 % Ber. Deutsch. Bot. Gesell., xxvii. (1909) pp. 239-47. 



