1004 SUMMARY OF CURRENT RESEARCHES RELATING TO 



aurantiacus with Polyporus sulfureus ; for tlie conidial state of Polyporus 

 vaporarius the author proposes the name Ptycliogaster ruhescens. 



Hetercecious TJredinese.* — Mr. C. B. Plowright describes two new 

 species of Puccinia, and also gives the results of some experiments on the 

 Gymnosporangia, 



Puccinia Phalaridis n. sp. The secidiospores of this Uredine, known as 

 Mcidium Ari Desm., occur on Arum maculatum ; the uredospores and 

 teleutospores on PJialaris arundinacea. The author states that it is speci- 

 fically distinct from the plant described by Schneider as P. sessilis. 



Puccinia arenariicola n. sp. The secidiospores of this species 

 occur on Centaurea nigra ; the uredospores and teleutospores on Carex 

 arenaria. It was conclusively demonstrated that P. arenariicola is distinct 

 from P. Caricis and P. ScJiceleriana. 



The author gives the details of some experiments on the Gymnosporan- 

 gia, and states that the life-history of these fungi is not so simple a matter 

 as the statements of Oersted would lead us to suppose. 



Ustilago Treubii.f — Graf zu Solms-Laubach describes under this name 

 a fungus which produces galls of two different kinds on Polygonum chinense 

 in Java. One of these kinds of gall is composed of growths caused by 

 the parasite proceeding from the cambium of the host. From the galls 

 issue club-shaped outgrowths composed of parenchymatous tissue pene- 

 trated by an irregular string of meristematic vascular bundles. By the 

 penetration into the tissue of a number of hyphae proceeding from this 

 structure a kind of capillitium is produced, among which are formed the 

 minute spores, about 4 /* in diameter. This capillitium assists the dissemi- 

 nation of the spores by preventing their soaking by the tropical rain. 



Fungus parasitic in Lecanium hesperidum.^ — M. E. Moniez finds that 

 the parasite first seen by Prof. Leydig in the blood of Lecanium hesperidum 

 is a fungus. He proposes for it the name of Lecaniascus polymorphus ; 

 its appearance varies considerably, according to the different stages of its 

 mycelium. Its simplest stage is that of an ovoid body, 4-5 fx long, and it 

 is then difficult to distinguish developed conidia or ascospores ; in this stage 

 budding is often observed. The mycelium sometimes presents a series of 

 very distinct swellings, which the author regards as the homologues of 

 conidia ; in this condition the mycelium itself may be 50-60 fx in length. 

 In highly developed individuals the mycelium, instead of being perfectly 

 homogeneous, is entirely filled with a finely granular protoplasm ; M. Moniez 

 is inclined to think that this is a stage preparatory to the complete trans- 

 formation of the mycelium into an ascus. 



A somewhat similar fungus has been described by Metschnikoff in the 

 blood of Daphnia magna, under the name of Monospora hicuspidata, and 

 another by Biitschli from Tylenchus pellucidus. 



Fungi parasitic on the Mulberry.§ — Sig. A. N. Berlese enumerates 

 as many as 176 species of fungus found on the mulberry in Europe and 

 America, growing chiefly on the branches, and either jDarasitic or not. Of 

 these 25 belong to the Hymenomycetes, 4 to the Discomycetes, 72 to the 

 Pyrenomycetes, 27 to the Sphseropsidefe, 41 to the Hyphomycetes, and 2 

 to the Myxomycetes. No species belonging to the Hypodermias is known 

 to grow on the mulberry, and the same is true also of the fruit-trees 



* Journ. Linn. Soo. Lond.— Bot., xxiv. (1887) pp. 88-100. Cf. this Journal, 1885, 

 pp. 288, 503. 



t Ann. Jard. Bot. Buitenzorq, vi. (1887) pp. 79-92 (1 p].). See Bot. Ztg., xlv. (1887) 

 p. 4G9. t Bull. Soc. Zool. France, sii. (1887) pp. 150-2. 



§ Bull. Soc. Ven.-Trent. Sci. Nat., iv. (1887) pp. 9-38. 



