82 SUMMAKY OF CURRENT RESEARCHES RELATING TO 



partly to weather conditions. He thinks that the parasitism of the 

 fungus is doubtful, and that the destruction of the trees is brought about 

 by soil and weather conditions. 



L. Rougier * publishes his experiences in the extermination of the 

 disease Black-rot in the vine. He advises the employment of a mixture 

 containing acetic acid rather than the Bordeaux mixture for spraying 

 the trees. 



P. Baccarinif notifies the disease of leaves of a hot-house plant 

 WhUerana canella. The leaves attacked are paler in colour, and show 

 round, olivaceous spots on the under side about a centimetre in diameter. 

 He found the spot infested by a fungus, a somewhat torulose brownish 

 myceUum, with two-celled elliptical gonidia. He has identified the 

 fungus with Ci/cloconii/m oleciffinum, an endophytic parasite. 



American Mycology. — W. A. Kellerman J describes in great detail a 

 new species of microfungi, Fhirrif/htia WiUkimsonmia, from Guatemala ; 

 it caused a disease of the Ameriain century plant. Agave amerkana, 

 attacking and finally destroying the leaves. It is conspicuous on account 

 of its red or yellowish-red colour. 



A new anthracnose of Alfalfa and red clover, due to the fungus 

 Coll etotrkh urn Trifolii, is recorded by Samuel M. Bain and Samuel N, 

 Essery.§ The clover is most susceptible to attack when the seedlings 

 encounter the first prolonged hot spells of summer, when the petioles are 

 attacked, and again as the seed is ripening when the stems at or below 

 the surface of the ground become diseased. 



G. F. Atkinson || publishes diagnoses of two new species of Agarics 

 from Central Ohio : — Naucoria paludosella, which grew on living 

 Sphagnum, other mosses, and on rotten wood ; Stropharia Hardii, which 

 is distinguished by its rooting base. 



A. P. MorganlF continues his monograph of North American species 

 of Lepiota. The present instalment includes 29 species. Very few of 

 them are British species ; several of them are described by Morgan for 

 the first time. 



G. G. Hedgcock** gives a list, with diagnoses, of some wood-staining 

 fungi from various localities in the United States. These belong to the 

 genera Ceratostomclla, Graphium, Fusarium, Hormodmdron, Hormiscium, 

 and Penkdlium. The colours induced by them on the wood are all of 

 a dark or dirty colour, blue-black and brown, with the exception of two 

 species, Fusarium roseum, which stains pine sapwood pink to lilac, and 

 Penkillium aureiim, which gives the same wood a yellow or red colour. 



Toxin of Aspergillus fumigatus.tt— E. Bodin and L. Gautier had 

 found that there was no poison in the cultures of this fungus ; but more 

 recently they detected some in cultures which contained, besides pepton, 

 a carbohydrate, glucose, or some similar substance. This was injected 



•^ Rev. Vilic, xxiv. (1905) pp. 71:3-19. See also Bot. CentralbL, cii. (1906) pp. 

 584-5. t Nuov. Giorn. Bot. Ital., xiii. (1906) pp. 281-7 (3 figs.). 



X Journ. Mycol., xii. (1906) pp. 185-7. 



§ Tom. cit., pp. 192-3. . |1 Tom. cit., pp. 198-4 (1 pi.). 



^ Tom. cit., pp. 195-203. ** Tom cit., pp. 204-10. 



tt Ann. Inst. Pasteur, xx. (1906) pp. 209-24. See also Ann. Mycol., v. (1906) 

 pp. 465-6. 



