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sedecim - dentato : dentibus ( maturitate, ) erectis, vel 

 paululum reflexis, acuminatisj basi latiusculis, pallidis, 

 obscure transversim striatis atque linea media longitu- 

 dinal! notatis. Operculum basi planiusculum, rubrum? 

 rostro longo recto fiavescente. 



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Few mosses have been involved in greater obscurity than 

 the present, partly perhaps owing to Hedwig's mcomplete and 

 very unsatisfactory figure, and partly owing to my having re- 

 ceived from the late excellent Swartz a plant for the Encalypta 

 crispata of Hedwig, which I have stated in the Addendum io 

 the first edition of the Muscologia Britannica to be the same 

 as Trichostomum polyphyllum^ and which Dr. Greville and 

 myself afterwards published in a Memoir on the Orthotri- 

 choid plants, in Brewster's Journal, as a doubtful species of 

 Orthotrichum. Bridel, in his Bryologia Universalis^ has in- 

 deed very much cleared up these difficulties by his 'excellent 

 description and observations : but still a good figure was 

 wanting to exhibit the character in the clearest light. 



I felt, then, peculiar pleasure in receiving, in a packet of 

 mosses from M. Mund, gathered at the Cape of Good Hope, 

 specimens of this plant, and from these I have no hesitation 

 in publishing it as an undoubted species of Grimmia^ and ^ 



coming: so near to Mr. Drummond's Gr. Hookeri^ of his 

 Musci Americanly (No. 61,) that I should not be surprised 



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if future observations should prove them to be the same. 



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If such be the case, Grimmia crispata inhabits stones at the j 



Falls of Niagara, (though rarely,) as well as the Cape of 

 Good Hope. In habit it approaches the GlypJiomitryon 

 Daviesiiy and small specimens of Trichostomum polyphylluin. 

 It brings the Grimmice^ too, very near the Orthotrichoid 

 family, especially in the structure of the calyptra. The sul- 

 cated and lacerated base of this calyptra seems to constitute 

 the only chai^acter of Bridcl's genus Brachypodinm; a name 

 (taken from the shortness of the seta,) which it scarcely 

 merits. In this respect it is surely liable to variation. 

 Bridel describes the seta as a little longer than the perichae- 

 tial leaves; Schwaegrichen as being twice as long. 



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