456 
SUMMARY OF CURRENT RESEARCHES RELATING TO 
Herr F. Bubak * establishes tlie genetic connection of Puecinia 
Scirpi, found on Scirpns lacu&tris , with the secidioform, JEciclium nym- 
phseoidis , parasitic on Limnanthemum nymphseoides. 
Herr M. Woronin f suggests that Monilia fructigena , an epidemic 
parasite on the cherry-tree, is probably the conidial form of Sclerotinia 
Cerasi. 
Sig. F. Cavara J finds plantations of the silver-fir greatly injured by 
the attacks of Cucurbitaria pityophila. The mycele induces a strong 
hypertrophy of the cortical tissue, accompanied by a splitting and scaling 
off of the periderm. A fresh interior periderm is thus formed, with a 
fresh phellogen and cortical parenchyme, provided with large resin- 
passages and sclerenchyme cells. 
M. P. Nypels§ gives the results of the enquiries. of a committee on 
vegetable pathology presented to the Botanical Society of Belgium. 
The following comprise the maladies attributed to the attacks of parasitic 
fungi : — Potato-mould and scurf ; probably frequently due primarily to 
the attacks of bacteria. The rust of flax, caused by the attacks of 
Melampsora Lini. The burning (brulure) of flax, probably caused by 
parasitic bacteria. A disease of flax caused by Phoma herbarum. Another 
disease of flax due to Fusicladium Lini. A malady of the celery pro- 
duced by Septoria Petroselini var. Apii. A destructive disease of pinks, 
apparently attributable to the attacks of an undescribed fungus. The 
mildew of the vine caused by Plasmopara viticola. A malady of grapes 
due to Spliserella Bathayi sp. n. The cancer of Populus canadensis , 
attributed to the attacks of Hyalopus Populi sp. n. In many cases the 
disease is constantly accompanied and aggravated by saprophytic Fungi 
and Schizomycetes. 
“Casse ” of Wine. — According to M. Laborde,|| the deterioration of 
red wine known as “ la casse ” — consisting of an iridescence of the 
surface, precipitation of the colouring matter, and a turbidity of the 
liquid — is due to the presence of an oxidising diastase or oxydase, the 
principal source of which is the mould produced by Boirytis cinerea. 
The part played by this oxydase appears to be to absorb the oxygen 
from the air and give it up to the colouring matter, which is thus ren- 
dered insoluble. 
Dr. P. Carles If discusses the remedies which may be employed to 
secure the vines from the attacks of this malady. 
Roccellese.** — Mr. 0. V. Darbishire describes an additional new 
genus of this family of lichens, with the following diagnosis : — Boccel- 
lina g. n. Thallus crustaceus v. subfruticulosus, strato corticali dis- 
tincto, ex liyphis formato plus minusve transversalibus congiutinatis, 
strato gonidiali et medullari stuppeo; apothecia terminalia v. subter- 
minalia, orbicularia, hypothecio et parathecio fusconigro, amphithecio 
* Oesterr. Bot. Zeitschr., xlviii. (1898) pp. 14-7 (1 pi.). 
t Zeitschr. f. Pflanzenkrankheiten, vii. (1897) p. 196. See Bot. Centralbl., 1898, 
Beili., p. 479. 
% Tom. cit. (1 pi.). See Bot. Centralbl., 1898, Beih, p. 479. 
§ CR. Soc. R. Bot. Belgique, xxxvi. (1898) pp. 183-276 (18 figs.). 
|| P.Y. Seances Soc. Sci. Pliys. et Nat. Bordeaux, 1897, pp. 11-4, 132-5. 
11 Tom. cit., pp. 14-5, 135-6. 
** Ber. Deutsch. Bot. Gesel!., xvi. (1898) pp. 6-16 (1 pi.). Cf. this Journal, 1897, 
p. 231. 
