REVUE BRYOLOGIQUE 19 



etreidentiqiieau "Grimmia pulvinata, forma brevicapsula; 

 var. obtusa Br. eur.,Schimp. syn. " Boulay, muscinees de 

 la France, p. 386. — Le vrai "G. obtusa Schw. " est le 



G. Doniana Smith. 



Prof. J. Macoun vient de me communiquer le rare 

 Racomitrmm dtq^ressum Lesq , recolte par M. A. P. Low 

 au Labrador, Irouve auparavant dans la vallee de Yosemite, 

 Galifornie. Cetle espece est alliee au R. protensum 

 (Braun) ; mais les feuilles sont decurrentes et auriculees, 

 distinctement carenees, peu ou pas appliquees a I'etat sec, 

 presque falciformes a I'etat humide ; cellules basilaires 

 pas longues, nervure percurretite; couleur noire (a I'etat 



sec). 



Upsala, Suede, 10 dec. 1900 



N. C. KiNDBERG. 



Oreoweisia laxifolia (Hook, f.) Par. Index bryol. 



B 



folia 



(1840) ; G. M., 



Syn. I, 783 (1849) ; Jaeg. Adum, 1, 344 (1874). - Weissia 

 serrulata var. laxifolia Wils. in Hook. Kew Journ. Bot.IX, 

 291 (1857). — Didymodon laxif alius Mitt. Muse. Ind. 

 Or., 23 (1859). — 'Weisia laxifolia Hpe. mss. in Jaeg. 

 Adum., II, 634 (1879). — Grimmia flaccida Royle mss. in 

 Herb. Hook.— Leptodontium laxif olium Hook. f. in Herb. 



E. Ind. Comp., nr. 22. . 



Hooker, in the original account of the above moss in the 

 Ic. PI. Rar. and in Hooker's Journal of Botany, gives a 

 description scarcely full and detailed enough to allow of 

 the species being recognized at the present day, besides, 

 unfortunately, erroneously describing and figuring the 

 leaves as quite entire. Hooker observed of his species, 

 "■ very dissimilar in general appearance from any known 

 species of Grimmia, although a careful examination of the 

 peristome has induced us to refer it to that genus " Mutler, 

 in Syn. I, 783, remarked '' Grimmiac apocarpae var. 

 rivulari ex icone habitus affinis videtur ". In 1857, however, 

 Ison indicated the true affinity of the plant by placmg it 

 CO a variety under " Weissia serrulata "; and m the Muse 

 Ind. Or. Mitten summed up the leading characteristics ot 

 the present species by describing it as " D sernilato 

 ( Weissia Fuul) simillimus, foliis autem laKionbus latiori- 

 bus et theca firmiore diversus esse videtur ". As, however, 

 no full description of Oreoweisia laxifolia has appeared 

 up to the present, it seems worth while to give here a 



W 



