586 Fungi etc. — Bryophyten. — Systematik der Phanerogamen. 



La question de i'origine des levures est debattue d'aprcs ces 

 documents nouveaux. 



La seconde partie est consacree aux experiences instituees avec 

 V Ascochyta Pisi. Malgr^ ses analogies avec les Gloeosporiiuri de la 

 Vigne et du Platane, ce Champignon cultive dans les memes con- 

 ditions n'a fourni ni levures, ni kystes, ni mycelium fragmente. Ces 

 r^sultats qui se maintiennent constants depuis dix mois montrent qua 

 tous les Champignons ne se pretent pas, avec une ^gale com- 

 plaisance, aux recherches sur le polymorphisme experimental. 



Ce Memoire est suivi d'une Note sur rinstallation de la Station 

 de Recherches viticoles pour la culture des parasites de la Vigne, 

 avec l'enumeration des principaux travaux qui y ont ete executes. 



Paul Vuillernin. 



Best, G. N., Ptychomitrinm Leibergii n. sp. (The Bryologist. IX. 

 September 1906. p. 80, 81. plate 7.) 



Described from material collected in Arizona, at an ahitude 

 of 4000 feet. Compared especially with P. Gardneri, from vvhich it 

 differs in „its smaller size, entire leaves, somewhat undulate but not 

 plicate, and by its peristomal teeth not divided to the base into 

 filiform Segments." Maxon. 



CocKS, Lewellyn J., Mninm medium Br. and Seh. in Britain. 

 (Journal of Botany. XLIV. Juiy 1906. p. 242.) 



The author gathered a synoicous moss on the western slope of 

 Ben Lawers in July 1902 and referred is to M. medium with some 

 doubt. His conclusion is confirmed by Dr. L Hagen who finds 

 that the specimen possesses all the more stable characters of the 

 species, namely, structure of stem and nerve, form of leaf and struc- 

 ture of leaf-teeth, which near the basal margin consist either of one 

 or of two cells ; and points out how it differs from M. affine and 

 M. cuspidatiim. The species is an addition to the British flora, and 

 curiously enough, Hypniim turgescens, another addition to the British 

 Flora, was also found on Ben Lawers on the same day. 



A. Gepp. 



Witte, H., Riccia Bischoffii Hüben er. En för Skandinavien 

 ny lefvermossa. (Botaniska Notiser. 1906. p. 211 — 214). 



Das genannte Lebermoos hat Verf. auf der Kalkheide unweit 

 Borgholm auf Öl and (Schweden) entdeckt. Nach den in der 

 Literatur vorliegenden Angaben, die vom Verf. eingehend erörtert 

 werden, lag die früher bekannte Nordgrenze der mitteleuropäischen 

 Art beim Harzgebirge. Durch die Entdeckung des Verf. wird 

 somit ihre Nordgrenze fünf Breitegrade nach dem Norden vorge- 

 rückt. Arnell. 



Baker, E. G., A new Indi^ofera from Tropical Africa. (Journal 

 of Botany. Vol. XLIV.* No, 525. September 1906. p. 314—316.) 



Indigofera circinella n. sp. (group: Alternifoliae) is nearly allied 

 to /. alternans DC. ; it is chiefly characterised by the circuinnately 

 twisted, subcylindrical, subtorulose pods. The author also gives 

 new localities, noted since the publication of his 1903 papers and 

 a list of the new species of Indigofera that have been described 

 from Tropical Africa since then. F. E. Fritsch. 



