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N° 1 ■ 28^ Annee 1901 ^^^^'^ 



\Ao\-0^ 



REVUE BRYOLOGIQUE uv^^-^i 



Paraissant tous les Deux Mois 



Les Manuscrits doivent etre ecrits en Irnncnis, en latin ou en anglais 



Sommaire du n" 1 



Timmia cucullata. Wimjams. — Le Lejounea Mackayi. Camus. — Flore 



^ bryol. de Pont-Aven (Finist6re). Dismier. — Hypnum Bestii. Renauld. 



^ Mousses r^coltees an Drt^sil par Puifrgari. Geheeb. — Grimmia homo- 



diclyoii et Gampylopus subulatus var. elougatus. Dixon.— Tortulacernua. 



HoBKiuK. — Musciuees de la Gote-dlvoire. Paris. — Notices biyologiquos. 



KiNDBERG.— Orcoweisia laxifolia. Salmon. — Bibiiographie.— Nouvelles. 



Timmia cucullata, Michx. 



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In a package of European mosses lately received by Mrs. 

 Britton from Harald Lindberg is a species of Timmia 

 labelled 7\ megapoUtana^ wich proves to be 7\ cuodlata^ 

 Michx. As this latter species has generally been misun- 

 derstood in this country and never credited to Europe, it 

 will be well to point out some of its characters. 



Timmia cvciillata, Michx. has the leaf blade as wide 

 above or even wider than the clasping base in most of the 

 leaves ; the leaf cells are larger than in T, jnegapolitaiia, 

 the median cells being about 12 ^ in diameter. The capsule 

 is always curved, nodding, scarcely furrowed when oldand 

 wide-mouthed, gradually narrowing from mouth to seta ; 

 the exothecal cells are mostly elongated and sinuous 

 walled. In the United States this species seems to be the 

 only one found any distance East of the Rocky Mountains ; 

 it occurs also on the Pacific slope and north to the Yukon 

 River, growing usually on damp, shady banks and some- 

 times on the base of trees. 



Timmia megapolitana, Hedw. as a leaf base wider than 

 the blade above, median cells about 8 ix in diameter, ripe 

 capsule nearly straight, becoming furrowed with age and 

 mouth not wider that the capsule below ; the exothecal 

 cells are irregular, scarcely elongated and sinuous walled. 

 I have found this moss usually growing at a somewhat 

 higher elevation than the preceding, mostly on rather dry 

 soil at the base of ledges of rock. It occurs in the Rocky 

 Mountains and northward to Alaska. The European 

 specimens of T. cucullata above referred to was collected 

 by F. V. Brotherus on the river Dvina neer Archangel, 



Russia. 



New- York Botanical Garden, U. S. A. 



R. S. Williams. 



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