DUSEN : PATAGONIAN AND FUEGIAN MOSSES. 



79 



obscurae, parietibus incrassatis ; bractece perichcetii erectae, convolutae, foliis 

 caulinis fere duplo majores et multo longius hyalino-cuspidatae, cellulis 

 dimidii inferioris bractearum rectangulis, pellucidis, ceterum foliis caulinis 

 similes ; seta stricta vel apice subflexuosa, siccitate dextrorsum torta, c. 

 1.45 mm. alta; theca ovalis, c. i mm. longa et 0.7 mm. crassa, leptoderma, 

 olivacea, vetusta pallide brunnea, erecta, bracteas vix vel paulum superans 

 siccitate irregulariter subsulcata ; peristomium rubrum, dentibus siccitate 

 subreflexis, c. 0.22 mm. altis et 0.06 mm. latis, late lanceolatis, apice 



FIG. 8. 



a b c d 



Grimmia macropulvinata Dusen. a, b, folia, ^j 8 - ; c, cellulae apicales, 

 e. gemmae, ^^- f y a pex bracteae, ^ 5 - ; g, theca vetusta humiditate, Jj 8 - ; h, capsula calyptrata humidi- 

 tate, Jj 8 -. 



f g h 



-^ ; d, cellulae basales, 



2-4-fissis, trabeculatis, dense papillosis ; operculum humiliter conicum, 

 baud rostratum ; 5/0^0.010-0.013 mm. magnae, laevissimae. 



Flores fern, paraphysibus hyalinis, filamentosis, paucis praediti. 



Hab. Patagonia australis, ubi species verisimiliter in territorio fontinali 

 fluminis Rio Chico in saxis lecta est. 



Resembling Grimmia pulmnata but growing in much larger tufts and 

 well distinguished from that species by the erostrate operculum. Nearly 

 allied also to G. tmmilis Mitt., to judge by the diagnosis, but differing 

 by its upper usually quadrate cells. 



Gen. RHACOMITRIUM Brid. 

 RHACOMITRIUM LANUGINOSUM (Hedw.) Brid. 



Hab. Patagonia australis in territorio fontinali fluminis Rio Chico in 

 rupibus. 



