580 SUMMAKY OF CURRENT RESEARCHES RELATING TO 



2000 ft. under tlie Zipser Magura, though recorded for Hungary pre- 

 viously only from granite at a height of 5000 ft. on the Hohe Tatra, 

 I. Gyorffy* shows that Polytrkhuni oliioense Ren. and Card, and P. de- 

 ci'piens Limpr. are not identical, but differ in the form of the marginal 

 cells of the lamella and in the constitution of the leaf -nerve. The 

 former species is confined to the New World, and the latter to the 

 Old. He also gives details as to the anatomy of the sexual and 

 asexual gQnQXnixons, of Pterygonerum cavifolium. M. Peterfi f gives an 

 account of Grimmia iilagioimdla, its morphology and distribution, and its 

 distinguishing characters. He also treats of the Hungarian .species of 

 CephalozielJa ; the discovery of C. hyssacea in Hungary, and its mor- 

 phology ; the distinctive characters of G. divarlcata ; and the occurrence 

 of G. Jacki'i in Hungary. He also discusses the morphology of Oligo- 

 trichwn incurvum, disagreeing with Lioapricht's interpretation of its 

 vascular bundle, and demonstrates that it is not homogeneous, but con- 

 tains a badrome for the conduction of water, and a leptome for the 

 conduction of plastic material. He also deals with the ecology of 

 peat-mosses, their origin and development, the physiological and 

 anatomical characteristics of the sphagna, and mentions certain ecolo- 

 gical properties according to which he distinguishes hydrophilous and 

 xerophilous forms, and gives a synopsis of 81 species and their forms, 

 classified according to these properties. G. Prodan % records new localities 

 in Hungary for three cleistocarpous mosses — Acaidon muticum, A. tri- 

 quetrum, and Phascum cuspidatum. 



North American Mosses. — A. J. G-rout § pubhshes some notes on 

 R, H. True's experiments directed towards the investigation of the 

 exciting causes of the curvature of the seta in Funaria hygrometrica 

 and 3Inmm cuspidatum. The young sporophyte grows erect, being 

 negatively geotropic ; but the young capsule becomes positively geo- 

 tropic and assumes a pendent position. Illumination determines the 

 plane in which the young capsule bends over. Incidentally, he shows 

 that the entire zone of growth of the young sporophyte lies entirely 

 within the shelter of the calyptra, and is thus protected from desicca- 

 tion. I. Theriot 1| gives a description and figures of Grimmia Bupreti, 

 a new species collected near Montreal by H. Dupret. E. J. Hill 1[ 

 publishes critical notes upon the validity of some North American 

 species of Fissidens : F. inconstans Schimp., F. synoicus Sulliv., F. minu- 

 tidus Sulliv., F. exiguus Sulliv. He re-describes the first two species, 

 and contrasts all four with their respective affinities. E. j\I. Dunham ** 

 records the occurrence of a curious variety of Polytrichum gracile in a 

 wooded swamp in Maine. The leaf-margins are three times wider than 

 in the type, and the lamellcE are three cells high instead of four or five. 

 A. L. Crocket tt announces the discovery of Gatharimm crispa in Maine, 

 where it had never previously been recorded. It was fertile, and was 

 found in a pasture on knolls where some six years ago a growth of alders 



* -Novdnyt. Kozlem., v. (1906) pp. 86-92, 135-45. 



t Tom. cit., pp. 46-51, 92-7, 124-35. % Op. cit. (1907) pp. 25-6. 



§ Bryologist, x. (1907) pp. 60-1. || Tom. cit., pp. 62-5 (1 pL). 



\ Tom. cit., pp. 67-74. 



** Rhodora, ix. (1907) p. 64. See also Brj-ologist, x. (1907) p. 75. 

 tt Tom, cit., p. 74. See also Bryologist, x. (1907) p. 74. 



