74 PATAGONIAN EXPEDITIONS I BOTANY. 



leaves and in its uninflated and scarcely distinct alar cells. From Di- 

 cranum rigens Besch. it is distinguished by its papillous nerve and its 

 alar cells. It appears to stand nearest to Dicranum orthocomum (Besch.) 

 C. Mull., but differs from that species in its more robust stem which is 

 nearly in its whole length densely tomentose, and in its much longer and 

 more erect leaves, being all papillous on the dorsal side of the nerve. 



DICRANUM DICRANELLATUM Dusen n. sp. 



PI. VIII, Figs. 2, 3. 



Autoicum ; dense vel interdum laxe caespitosum, caespitibus plerumque 

 parvis, humilibus, lutescente viridibus, vel nitidis, inferne ferrugineis ; 

 caulis erectus vel adscendens, 2-3 cm. altus, simplex vel basi pauci-ra- 

 mosus, summitate brevissime ramulosus, gracilis, fere ad apicem ferru- 

 gineo-tomentosus ; folia densa, 'siccitate suberecta, strictiuscula vel plus 

 minusve arcuata, suprema interdum subuncinata, humiditate patentia, 

 strictiuscula vel leviter recurvata, e basi lineari-oblonga sensim longe 

 capillari-attenuata, usque ad 10 mm. longa et basi 0.45 mm. lata, canali- 

 culata, marginibus integerrimis vel apice solummodo serrulatis, nervo 

 valido, laevissimo, basi c. 0.2 mm. lato, to tarn partem supremam folii oc- 

 cupante ; cellules basales elongatae, parietibus interrupte incrassatis, ceterae 

 ovales vel rotundatae, alares amplae, subquadratae vel breviter subrec- 

 tangulae, distincte limitatae, nervum attingentes, aureo-brunneae ; bractecz 

 Perichcztii erectae, cylindraceo-convolutae, superne raptim contractas et 

 capillari-attenuatae, tenuiter nervosae, nervo percurrente, cuspidem for- 

 mante, cellulis elongatis, parietibus interrupte incrassatis ; seta erecta, 

 stricta, tenuis, 2-2.5 cm - alta, flavidula ; theca cylindrica, stricta, laevis- 

 sima, olivacea, vetusta pallide brunnea, c. 2 mm. longa et 0.5 mm. diam., 

 siccitate sub ore paulum constricta ; peristomii denies rubri, 0.5 mm. alti 

 et basi 0.06 mm. lati, ultra medium in cruribus binis fissis, superne sub- 

 nodulari- et papilloso-scabri, inferne obsolete plicato-striati, lamellis c. 10, 

 validis; operculum conicum, oblique rostratum, rostro theca fere acqui- 

 longo ; cetera ignota. 



Flores masculi paulum infra florem fern, dispositi, gemmiformes, in 

 tomento occulti ; folia perigonalia e basi concava, suborbiculari longe 

 capillari-attenuata. 



Hab. Fuegia australis ad Villarino. 



Near to Dicranum macropus Kze. but differing by its completely gla- 

 brous leaf-nerve and its erect capsule. 



