214 SUMMAEY OF CURRENT RESEARCHES RELATING TO 



Emil Werth * has proved that Ustilago antheranmi may infect the 

 flower of Melandrtjum album after the stigma is dead, and that seeds from 

 such a flower may be healthy. Seedlings and shoots may also be infected 

 by the fungus. In the infected plants the mycelium spreads through the 

 tissues till they are all permeated by the fungus. Insects play an im- 

 portant part in spreading infection. 



Research on Uredinese.t — F. Moreau describes an a3cidium that is 

 characterized by its uninucleate condition. The fficidium was taken from 

 Euphorhia silvatica, but as the author did not succeed in germinating the 

 spores, she is unable to state if it belongs to Endophyllmn or to some 

 other Uredine. The secidia do not differ from others except that all 

 the cells (spores, etc.) are uninucleate. There is no duplication of nuclei 

 at the base of the fecidium, nor subsequent conjugate nuclei. 



Biology of the Uredineae.f — -Rene Marei has written a paper which 

 gives the results of research on this group of fungi. He devotes the first 

 part to an account of the development of different Uredines, and discusses 

 the questions of sexuality and of the origin of the group. The second 

 part deals with the rusts in relation to the host-plant, and with such 

 questions as the dissemination of spores, plant-infection, immunity, etc. 

 The whole paper provides an exhaustive summary of what is known about 

 the Uredinese. 



Notes on the Larger Fungi. — C. Wehmer § has examined the 

 guttulte, or oil-drops, in the spores of dry-rot in order to determine their 

 exact nature — if they are fat-drops or not. He finds they are formed of 

 ethereal oil, and he thinks that the odour of the dried fungus is probably 

 due to the oil. 



G. Bergamesco II states that the species Marasmius BicUiardi is 

 only an abnormal condition of the older species 31. rotida. The former 

 is distinguished by a branching stalk, but the author has observed both 

 simple and branched forms develop from the same mycelium. 



T. Fetch If has studied the genus Septohasidium, a tropical fungus 

 which encrusts living stems or leaves up to a height of 10 ft. or more 

 from the ground. He concludes that the species of this genus are 

 parasites on scale insects. They live not on the secretions of the insects, 

 but upon the insects themselves. 



German Fungus Flora.** — W. Migula has issued a number of fascicles 

 of the flora. He has completed the brown-spored gilled forms, and 

 has begun the description of the white-spored forms which he places 

 under one genus, Agaricus, with the other genera as sub-genera 

 Tricholoma, Mycena, etc. He also reverses the order to which we are 



* Arb. k. Biol. Aust. Land. Forst., viii. (1911) p. 427. See also Centralbl. Bakt., 

 xxxii. (1912) p. 297. 



t Bull. Soc. Mycol. France, xxvii. (1911) pp. 489-93 (1 fig.). 



X Progr. Rei. Bot., iv. (1911) pp. 109-62. See also Bull. Soc. Mycol. France, 

 xxvii. (1911) pp. 516-17. 



§ Bar. Deutsch. Bot. GeseU., xxix. (1911) pp. 483-7 (6 figs.). 



II BuU. Soc. Bot. Ital. 1911, pp. 228-32. 



i Ann. Bot., xxv. (1911). 



Flora von Deutschland, v. (Gera, 1911) fasc. 12, pp. 481-672 (60 pis.). 



** 



