78 PATAGONIAN EXPEDITIONS '. BOTANY. 



parietibus strictis, paulum incrassatis, ceterae omnino quadratae, c. 0.008 

 mm. magnae, parietibus incrassatis subflexuosis, marginales superne saltern 

 bistratosae ; bractece perichcetii foliis caulinis multo majores, flavo-virides, 

 erectae, subconvolutae, apice hyalino longiore praeditae, cellulis in dimidio 

 inferiore bractearum rectangulis, subpellucidis, ceterum foliis caulinis sim- 

 ilibus ; seta brevissima, 0.2-0.35 mm - alta; theca brunnea, breviter urna- 

 cea, c. i.i mm. longa et 0.9 mm. crassa, macrostoma, pachyderma; cel- 

 lulce exothecii paulum incrassatae, marginales parvae, 2-3-seriatae, trans- 

 versaliter rotundate subrectangulae, ceterae omnino rotundate rectangulae, 

 rotundate quadratis vel subrotundis mixtae ; peristomii denies aurantiaci, 

 late lanceolati, c. 0.4 mm. alti et 0.14 mm. lati, subobtusi vel acuti, medio 

 et superne hie illic longitudinaliter perforati, interdum apice paulum fissi, 

 dense papillosi graciliterque trabeculati ; operculiim convexum, rostro 

 brevi, crasso, obliquo coronatum ; sporce c. 0.013 mm. magnae, pallide 

 brunneae, laevissimae. 



Hab. Patagonia australis, ubi verisimiliter in territorio fontinali fluminis 

 Rio Chico in saxis lecta est. 



Closely allied to Grimmia apocarpa (L.) Hedw., differing in the leaves 

 having narrower basal part, smooth basal cells and shorter broader and 

 complanate apex, in the shorter and broader capsule, in the peristomial 

 teeth being broader in their upper part and usually obtuse, and in the 

 less regular cells of the exothecium. 



GRIMMIA MACROPULVINATA Dusn n. sp. 



PI. VIII, Fig. 7. 



A^itoica; dense pulvinatim caespitosa, caespitibus griseoviridibus, usque 

 ad 5 cm. diam., humilibus; caiilis vix i cm. altus, simplex vel dichotome 

 ramosus, hand raro fasciculatim ramulosus, infima basi tantum radicu- 

 losus; folia densiuscula, usque ad 1.5 mm. longa et 0.4 mm. lata, siccitate 

 appressa, stricta, suprema interdum subspiraliter torta, humiditate patula 

 strictaque, e basi sublineari vel subovali lanceolate elongata, sensim in 

 pilo hyalino, remote denticulate, folio multo breviore, stricte vel interdum 

 subflexuoso producta, canaliculata, apicem versus carinata, marginibus 

 integerrimis, haud reflexis ; nervo basi c. 0.04 mm. crasso, apicem versus 

 tantum dorso paulum prominente exarata ; cellules basales pellucidae, vix 

 pachydermaticae, juxta nervum sitae rectangulae, juxta marginem sitae 

 quadratae, ceterae omnino quadratae, c. 0.008 mm. magnae, chlorophyllosae, 



