Pflanzenkrankheiten. — Lichenes. — Bryophyten. 247 



with the dates of spraying and nature of the mixtures. If made up 

 with sea water the spray is shown to lose much of its efficienc}', 

 and therefore, though better than none at all, a seawater mixture 

 should only be used where it is impossible to obtain f'resh water. 

 The other diseases dealt with are Sclerotium Stalk Disease, Bacillus 

 melanogenus, Yellow Blight, Potato Botrytis, Spongospora, Hypochnum 

 Solan/ and various lbrms of leaf Curl, the two first being treated 

 at some length. A. D. Cotton (Kew). 



Priestly, J. H. and A. E. Lechmere. A Bacterial Disease 

 of Swedes. (Journ. Agric. Sei. III. 4. p. 392—398. Dec. 1910.) 



An aecount of experiments with an organism causing a disease 

 of swedes. The bacillus is referred to B. oleraceae Harrison, but it 

 is also closely allied to Pseudomonas destruetans Potter. It is sug- 

 gested from the consideration of its appearance on various media, 

 that these two organisms may be different growth-forms of the 

 same species. The parasite thrives both on aeid and alkaline media. 



A. D. Cotton (Kew). 



Gallöe, O., Lichens from North-East Greenland, collec- 

 ted by the Danmark-Expedition 1906 — 1908. (Meddel. 

 Grönland. XLIII. 9. p. 181 — 191. Copenhagen 6/8. 1910.) 



This work has brought to a preliminary close the floristic side 

 of liehen colleeting in Greenland, as practicalty the whole coast 

 of the land has now been investigated. The 68 species mentioned 

 here have almost all been found in Greenland before, a single 

 species is new for Greenland, viz. Dufourea muricata Laur., which 

 was formerly found in Spitzbergen by Th. Fries. 



J. Lind (Copenhagen). 



Savicz , V. P., Interessante und neue Arten und Formen 

 der Flechten im Gouv. Nowgorod 1910 gesammelt. 

 (Bull. Jard. bot. St. Petersbourg. XL 2. p. 50—55. mit Fig. 1911. 

 Russisch mit deutsch. Resume.) 



Mit lateinischen Diagnosen beschreibt Verf. folgende neue Ar- 

 ten und Formen: Lecanora saepimentorum, L. globulosa, Evern/a 

 thamnoides (Flot.) Arn. f. n. arenicola, Cetraria islaudica (L.) f. n. 

 vagans, Lecanora dispersa (Pers.) f. n. pruinosa, Cladonia rangife- 

 rina (L.) f. n. testicola, Cl. silvatica (L.) f. n. tectorum, Evernia pru- 

 nastri Ach. f. n. stictocera (Hook.) Savicz. — Interessantere Funde 

 sind noch: Lecania prasinoides Elenk., Rhizocarpon teduetum Th. Fr. 



Matouschek (Wien). 



Bauer, E., Musci europaei exsiccati. Serie 16. N°. 751 — 800. 

 (Schedae hiezu 8 pp. Prag, Smichow, Komenskyg. 961. 1911.) 



Die vorliegende Serie umfasst Gattungen von Campylium, Rhi- 

 tidiadelphus , Hylocomium, Hypnum, Lsopterygium, Plagiothecium, 

 RhapJüdostegium, Brachythecium, Scleropodium , Scorpiurium, Cirri- 

 phylhun, Oxyrrhynchium , Enrhyncliium, Bryhnia. 



Neu sind für die Wissenschaft: Campylium polygonum n. var. 

 snbsecundum Arn. (Schweden), Isopterygium silesiacnm n. var. ad- 

 pressum Blumrich in scheda (Vorarlberg), Brachythecium reßexum 

 n. f. umbrosa C. Jensen (Schweden), Brachythecium velutinum n. f. 

 molluscoides Bauer .'Salzburg), Scorpiurium circinatum var. attenua- 

 tum Boul. n. f. Leskeacea (Soitl. in scheda) Bottini (Küstenland), 



