428 SUMMARY OF CUKUENT RESEARCHES RELATING TO 



for the Liverpool Botanical Society. Several rare species are included, 

 one at least new to Britain, Chsetomastia cmiescens, and a variety of 

 Sphserospora trechispora, which is new to science and was determined by 

 Boudier. Microscopic species are especially well represented in the list. 



Study of Citromyces.* — G. Baiuier and A. Sartory have determined 

 and cultivated several species of Citromyces. The generic name was 

 given to Aspergillus-\\kQ moulds that were able to convert glucose into 

 citric acid. Of the three species experimented with one had not this 

 property, though it agreed morphologically with the others, and the 

 authors hold that the generic name, as it does not express the characters 

 of all the species, has been badly chosen. 



Uredineae.l — E. J. Butler describes some rusts found on wild vines 

 in India, Phakopsora vitis, and a second which proved to be Chrysomijxa 

 vitis sp. u. The wild vines in Mussoorie were much affected by the rust, 

 and it is feared that it may pass to the cultivated plant if due precaution 

 is not taken. 



P. Dietel % writes on the relationship between the two genera of 

 Uredinege, Kuehneola and Phragmiclium. The so-called teleutospores 

 of the former are really chains of spores which remain attached together, 

 Dietel finds that there is affinity with species of Uromyces. There are 

 no paraphyses in either of the genera, and some other characters also 

 favour this view. 



G. G. Hedgcock§ publishes notes on some Urediuese which attack 

 forest trees in Western America. Species of Peridermium on pines are 

 described. P.filamentosum stimulates the growth of the twigs ; in older 

 trees it kUls the tops. P. Harhiessii gives rise to globose or oblong galls 

 or burls, varying in diameter from a pea to more than a foot. They 

 are formed round the twigs, branches, or trunks at the point of attack. 

 P. coloradense causes the formation of dense deciduous leafy witches' 

 brooms which bring about the death of the trees. Uredo (Melampsora) 

 Bigelowii on willows a serious parasite, as also U. (Melampsora) Mediisse 

 on poplars, which injures the leaves and arrests the growth of the younger 

 trees, are also very prevalent. 



S. Strelin |1 has made a biological and morphological study of 

 Kuehneola albida and Uredo Millleri its associated form. The uredo- 

 spores are peculiar in that they do not germinate immediately after 

 ripening : they resemble teleutospores in being winter forms. There 

 is, however, a second probably physiological uredoform of which the 

 spores probably germinate at once, though that has not been proved. 

 These uredospores resemble ascidospores in their cytology, as the myce- 

 lium from which they are produced has uninucleate cells, and the spores 

 themselves are binucleate. 



Werner Schneider 1[ has made a series of culture studies in the 

 family LiliaccEe. He proved that Uromyces scillarum taken from 

 Muscari racemosiim would not grow on 31. botryoides nor on Scilla 



* Journ. R. Mycol. France, xxviii. (1912) pp. 38-49 (2 pis.). 

 t Ann. Mycol., x. (1912) pp. 153-8 (1 fig.). 



: Ann. Mycol., x. (1912) pp. 204-18. § Mycologia, iv. (1912) pp. 141-7. 



II Mycol. Centralbl., i. (1912) pp. 131-7. 

 % Centralbl. Bakt., xxxii. (1912) pp. 452-3. 



