7 6 



PATAGONIAN EXPEDITIONS I BOTANY. 



lata, sicca suberecta, conduplicata, marginibus reflexis, plerumque incur- 

 vata, suprema etiam subcontorta humida patentia, suprema arcuate reflexa, e 

 basi amplexicauli, baud decurrente linearia, canaliculata, marginibus papil- 

 loso-erosulis, e basi ad medium vel altius reflexis; nervo rubro, o. i mm. 

 lato, dorso praecipue basin versus minute papilloso-scabro, excurrente, 

 aristam rectam, leviter denticulatam vel subglabram formante ; cellulce 

 basales elongatae, rectangulae, hyalinae, laevissimae, ceterae minutissimae, c. 

 o.oii mm. magnae, omnino subrotundate quadratae, obscurae, minutissime 

 denseque papillosae, parietibus incrassatis; bractece perichcetii foliis caulinis 



FIG. 6. 



Barbula perrubiginosa Dus6n. a, folium, J T ; b, folium planefactum, ; c, apex folii, -"/; d, sec- 

 tiones folii, -\ 2 - ; e, theca humiditate, Jj 8 -. 



similes. Seta c. i cm. alta ; stricta, purpurea, laevissima, nitida, sinistror- 

 sum torta ; tlteca cylindrica, subcurvata, atropurpurea, c. 5 mm. longa et 

 0.6 mm. crassa, siccitate nitida leviterque rugosa ; annulus simplex ; peri- 

 stomium c. 1.9 mm. altum, tubulosum, tubo 0.63 mm. alto, inferne albes- 

 cente, superne purpureo, ubique minutissime et densissime papillose, 

 indistincte tessellato, cruribus filiformibus, liberis, basi vix binatis, 0.013 

 mm. crassis, purpureis, fere bis contortis, densissime papillosis ; opemt- 



