64 SUMMARY OF CURKENT RESEARCHES RELATING TO 



Melampsora Cultures. — J. R. Weir and E. E. Hubert {Mycologia, 

 1918, 10, 195-8) give results of cultures with the rusts of Populus, 

 These were known as Melampsora medusse and M. albertensis, but as 

 both infect Pseudotsuga and Larix, it is suggested that they should be 

 recognized as one species, M. medusse. • A. L. S. 



Puccinia on Carduaceae. — H. S. Jackson {Bot Qaz., 1918, 65, 

 289-312) gives a descriptive list of Puccinife on the three genera of 

 CarduaceaB — Vernonia, Elephantopus, and Fiptocarpa. The two latter 

 genera harbour two species of the rust, while on Vernonia twenty-five 

 species are here recognized on the various hosts. The rusts are more 

 numerous in the sub-tropical than in the temperate regions. Some of 

 the species are new to science. A, L. S. 



Study of the Genus Kuehneola.^J. C. Arthur (Bull. Torrey 

 Bot. Club, 1917, 44, 501-11) describes the characteristic features of 

 this genus — viz. the formation of the teleutospores in chains. Arthur 

 separates from the genus two forms which grow on Potentilla and on 

 Duchesnea, in which the teleutospores are stalked like those of Phrag- 

 midium, but have smooth walls and a single apical pore in each cell. He 

 places these two forms in a new genus, Frommea, and adds a new species 

 on Polylepus from Ecuador. A. L. S. 



Study of Gymnosporangium. — B. D. Dodge {Mycologia, 1918, 10^ 

 182-93, 3 pis.) has made a careful cytological study of six species of 

 this genus. He finds that the teleutospores arise from the subterminal 

 cells of the tissue composing the primordium. The developing sorus is. 

 covered by the thick epidermis of the host, or, in the case of galls on 

 stems, by several layers of cork ; these are burst, and the spores continue 

 to develop, though no evidence has been found to show that they ever 

 arise from a terminal cell. 



In another paper {Bull. Torrey Bot. Club, 1918, 45, 287-300) "Dodge 

 records the results of further studies of Gymnosporangium, being a 

 summary of cultures made in 1915 and 1916. He gives an account 

 of inoculation experiments which resulted in the infection of red cedar 

 with Gymnosporangium clavipes, G. macropus, G.glohosum, and G. nidus- 

 avis. The development of these species and their effect on Juniperus 

 is described. A. L. S. 



Hyphomycetes. — J. S. Batliss Elliott {Trans. Brit. Mycol. Soc.^ 

 1918, 6, 37-8, 4 figs.) watched the development of the spores of 

 Tricothecium roseum. They grew in a moist chamber, a very sheltered 

 position, and the production of spores was abundant and somewhat 

 abnormal. Racemes of spores instead of clusters were formed at the tips 

 of the conidiophores. A. L. S. 



Hyphomycetes and the Rotting of Timber. — A. Lorrain Smith 

 {Trans. Brit. 3Iijcol. Soc, 1918, 6, 54-5), on examining some rotted 

 house timbers, found that the woody tissues were permeated with a 

 dark mycelium. In one instance the fungus was identified as Torula 

 abbreviata, in the other as Haplographium finitimum. The decay of the 

 timber was evidently due to the action of these fungi. A. L. S. 



