88 



PATAGONIAN EXPEDITIONS: BOTANY. 



laevissimi, fere ad apicem longitudinaliter perforati . . . ; operculuni coni-*' 

 cum, apice brevissimo, crasso, truncate coronatum ; sporce rotundas, c. 0.028 

 mm. magnae, laevissimae. 



PLANTA MUSCULA. Catilis simplex vel pauci-ramosus, gracillimus, e 

 basi ad medium radiculosus, radiculis atropurpureis, longe deorsum foli- 

 atus, foliis iis medianis plantae femineae similibus ; flores terminales, dis- 

 coidei ; bractecs perigonii e basi erecta sat raptim attenuata, valde elongata, 

 usque ad 6 mm. longa, arcuata recurvata vel patentissima, nervo valido, 



FIG. 15. 



a bee f g h 



Leptobryum pottiaceum Dusn. a, folia mediana plantae fern., -; b, cellulse basales, -^ ; c, cellulsa 

 apicales, ^- ; d, folium plantae masc. , ij 8 - ; e, folium perigoniale a latere visum, JL 8 - ; f, capsula opercu- 

 lata humiditate, -ij 8 - ; g, capsula deoperculata humiditate, -L 8 - ; h, capsula deoperculata siccitate, g-. 



sat longe infra apicem evanido ; paraphyses numerosi aurei, superne 

 paulum crassiores, plerumque acutiusculi : antheridia fere cylindrica. 



Hab. Patagonia australis in territorio fontinali fluminis Rio Chico in 

 truncis putridis et in terra. 



Fuegia australis ad Lapataia in terra. 



Well distinguished from Leptobryum pyriforme (Hedw.) Schpr. as well 

 as from Leptobryum sericeum from Tasmania, being marked by its long 

 seta and erect, comparatively long, unsymmetrical, dark brown and shin- 

 ing capsule. 



