ZOOLOGY AND BOTANY, MICROSCOPY, ETC. 225 



Uredineae. — R. Probst* has continued the work undertaken but not 

 completed by E. Jaeky, on the infection of Compqsitse with Puccinia 

 Hieracii. Jacky had proved that it was a compound species. One of 

 the forms, P. Leontodontis, proved to be very varied in the appearance of 

 the teleutospores, and Probst instituted a series of inoculation experiments 

 with species of Leontodon, Hieracium, and Hypochseris. The material 

 was taken from L. hispidus, and he found that neither Hieracium nor 

 Hypochseris was liable to infection. Other forms recognised by Jacky as 

 distinct, P. Hypochaeridis and P. carduorum, were found to give some- 

 what similar results, i.e. their power of infection was limited to certain 

 species of Hypochseris or Garduus respectively. 



S. Kusana f describes some rusts that attack Chrysanthemum. The 

 first, Puccinia Chrysanthemi, the black rust, appeared some years ago, 

 and did great damage to the plants in Europe and America. It has been 

 determined as identical with the rust of Chrysanthemum in Japan, but 

 Kusano indicates several points of difference between the two forms. In 

 the European, the uredospores winter on the young shoots in greenhouses, 

 and teleutospores are rare. In Japan the uredospore is followed regu- 

 larly by the teleutospore, though in warm neighbourhoods the uredo- 

 stage persists. The formation of 2-celled uredospores and of mesospores 

 is also described by the author as occurring both in Japan and in Europe. 

 Kusano ascribes these variations of spore-f ormatior* to the differences in 

 locality and temperature. The white rust, P. Horiana, forms large white 

 waxy sori, and is more injurious than the black rust, but it does not 

 attack all forms of Chrysanthemum. There is, further, a brown rust, 

 Credo autumnalis, common in the warmer regions of Japan, and of 

 which only the uredospore form is known. It occurs on several species 

 of Chrysanthemum. Kusano thinks that these rusts, though somewhat 

 specialised to different hosts, originated on Chrysanthemum Decaisneanum. 



J. C. Arthur % defends his new classification of the Uredineaj against 

 various mycologists who have criticised the changes he has made. He 

 pleads that further knowledge has necessitated the splitting up and 

 rearranging of such genera as Uromyces and Purr in in. and he holds that 

 recent research on the nuclei of the different generations in the rusts 

 prove the correctness of his scheme. 



P. Hariot§ has published an account of French Uredinere in a 

 volume forming part of the Encyclopedic Scientifique. There are two 

 sections of the work, the first dealing with morphology, etc., the second 

 with an account of the classification of the species occurring in France. 



Ed. Fischer || publishes an account of experiments made with 

 JEcidium homogynes Schrcet., the teleutospore form being Uromyces 

 Veratri. This fungus has been found on Homogyne alpina and 

 Admostyles alpina. Fischer, as a result of his inoculation experiments, 

 concludes that there are two Uredines concerned, Adenostylis sp. and 

 Homogynes sp., both being biological forms of Uromyces Veratri. 



* Ann. Mycol., vi. (1908) pp. 289-300. t Tom. cit., pp. 306-12. 



J Tom. cit., pp. 326-30. 



§ Bibliotheque Bot. Crypt. Paris : 0. Doin, 1908, 387 pp. (47 figs.). See also 

 Ann. Mycol., vi. (1908) p. 363. 



|| Centralbl. Bakt., xxii. (1908) pp. 89-96 (3 figs.). 



