86 N. BRYHN. [2nd arc. EXP. fram 



157. Bryum angustidens Bryhn & Ryan sp. nov. 



Csespites densi, 2.5 cm. alti, iiitus incano-fiisci, zonati, superne 

 virides. 



Surculus pluries innovando ramosus, innovationibus gemmaeformibus 

 numerosis superposilis inferne subnudis nodosus, tomento fusco verru- 

 coso vestitus. 



Caulis 0.25 mm. crassus, ruber, sectione transversa ovalis; rate in- 

 termedium laxum, tenue, rubrum, versus peripheriam e cellulis minori- 

 bus pauUo magis incrassatis formatum ; fasciculus centralis irregularis 

 inter cellulas intermedias arete inclusus. 



Folia caulina parva, partim in tomento occulta, pauca, late ovalia, 

 fere sqvamseformia, margine plana, costa duas tertias folii percurrenti. 



Folia comalia subito majora, concava, in gemmam ovato — oblongam 

 dense congesta, externa parva ovalia, obtusa vel subito et breviter acu- 

 minata, interna varia, aut ovato-ovalia cum vel sine acumine brevi aut 

 late ovata in mucronem brevem e costa excurrenti formatum minus 

 subito angustata, circiter 2.2 mm. longa et 1-3 mm. lata, omnia mar- 

 gine elimbata et plus minusve late reflexa. 



Cellulse foliares mediocriter incrassatse, corpora oleosa ssepe inclu- 

 dentes, basilares elongato-rectangulae, parietibus rubris, ad angulas dila- 

 tatos rotundato-inflatee, vulgo bistratse, illse folii medii et superioris bre- 

 viter rhombeo — hexagonae, marginales e basi ad medium folium in serie- 

 bus pluribus qvadratse. 



Costa inferne lata rubra, superne sensim angustior luteo-virens, non 

 nisi in foliis comalibus nonnullis excurrens. 



Folia perichsetialia e basi lato sensim angustata, interna margine 

 plana, brevi-costata. 



Inflorescentia heteroica, floribus bisexualibus paucis et masculis nu- 

 merosis; archegonia circiter 8, 0.7 mm. longa; antheridia pauca, 0.6mm. 

 longa; paraphyses longiores, inferne rufescentes. 



Seta 1 cm. longa, luteo-fuscescens, rigida, apice paullo crassiore 

 hamata. 



Capsula pendula, operculata 2 — 2.5 mm. longa et 0.8 mm. crassa, 

 pallide luteo-canescens, oblonga, regularis, sub orificio baud constricta, 

 siccitate baud mutata, cellulis epidermicis marginalibus in seriebus 2 — 3 

 transverse rectangulis, ceterum breviter rectangulo — rotundatis, parietibus 

 illarum sinuosis et incrassatis. Sporangium in coUum sensim defluens. 

 Collum tumidum breve, longitudine dimidium sporangii, fusco-lulescens, 

 siccum longitudinaliter rugulosum, cellulis epidermicis irregularibus, qva- 



