334 SUMMARY OF CURRENT RESEARCHES RELATING TO 



irregular form of the stolons, and has been therefore placed in a separate 

 genus TiegJiemella. Vuillemin supports this view, as he has found 

 another species on the roots of an Orchis still more erratic, which he 

 designates as T. Orchidia. He proposes a new genus Proabsidict for 

 Mucor Saccardoi, which has neither stolons nor rhizoids, but which is 

 otherwise closely allied to Absidia. Mucor corymbifer he places in the 

 same group as type of a new genus Lichtheimia. Mycocladus verticiUatus 

 also becomes a member of the series, which he resumes thus : — (1) 

 Proabsidict {P. Saccardoi) ; (2) Lichtheimia (L. corymbifera) ; (:->) Myco- 

 cladus (M. verticiUatus) ; (4) Tieghemetta (T. dubia, Orchidis, repens) ; 

 (5) Absidia (A. septata, capillata, reflexa). 



New Discomycetes.* — P. Hennings describes several new Pezizse 

 found recently in Germany by himself and others. The diagnoses are 

 accompanied by critical notes. 



Disease of Fir Trees.f — H. Mayrhas made a thorough investigation 

 of a disease of fir trees termed Schutte. He proved by infection ex- 

 periments that it was due to the attack of the parasitic fungus Lopho- 

 dermium Pinastri. It is especially harmful to seedling plants. The 

 needles become infected from May to July. A period of inaction sets 

 in, and it does not spread until May of the following year, when spores 

 from the perithecia of the fungus are set free and renew their growth on 

 other hosts, the wind probably acting as carrier. 



Ruhlandiella berolinensis, g. et sp. n.J — P. Hennings has so named 

 a member of the Rhizinaceae, a small globular body surrounded by 

 a palisade-like envelope of asci and paraphyses. The fungus is closely 

 akin to Sphcerosoma, the spores are very similar. It grew on turf -soil 

 in a conservatory at Berlin. 



Disease of the Vine.§ — Herm. Miiller-Thurgau gives a detailed 

 account of the fungus causing the disease known as red-brand. The 

 mycelium attacks the leaves of the vine, causing burnt-looking patches. 

 So long as the mycelium is purely parasitic on the living leaf, it inhabits 

 the vessels. It invades the neighbouring cells on the death of the 

 tissue, and externally conidiophores of branched hyphse with terminal 

 coridia are formed. The fungus was grown in artificial cultures and 

 sclerotia were produced after considerable time, but no further stage 

 was noted. 



The writer then examined the leaves killed by the disease, and found, 

 growing on them, a species of Pseudopeziza. He cultivated the 

 ascospores and produced a similar mycelium to that grown from the 

 mycelium taken from the leaf ; finally he produced conidiophores and 

 conidia in the cultures, which corresponded with those that grew on the 

 diseased leaves. The infection of a healtby vine with the ascospores 

 has not yet been attempted. 



The name Pseudopeziza traeheiphila was given to the fungus as in 

 the early stages it is confined to the vessels of the host-plant. 



* Hedw. Beiblatt, xlii. (1903) pp. 17-20. 



t Forstwiss. Centralbl., xxiv. (1902) pp. 473-9. See also Centralbl. Bakt., x. 

 (1903) pp. 200-1. 



J Hedw. Beiblatt, xlii. (1903) pp. 22-4 (5 figs.). 



§ Centralbl. Bakt., x. (1903) pp. 81-S and 113-21 (5 pis.). 



