DUSEN : PATAGONIAN AND FUEGIAN MOSSES. 87 



It can scarcely be doubted that the numerous cylindrical gemmae, com- 

 posed each of 4-8 uniseriate cells, which were found in the tufts, belong 

 to the plant and were originally situated on the excurrent part of the 

 leaf-nerve. 



Fam. FUNARIACE.E. 



Gen. FUNARIA Schreb. 



FUNARIA HYGROMETRICA (L.) Hedw. 



Hab. Fuegia australis ad Lapataia in terra. 



Fam. BRYACE.E. 



Gen. LEPTOBRYUM Schpr. 



LEPTOBRYUM PYRIFORME (L.) Schpr. 



Hab. Patagonia australis in territorio fontinali fluminis Rio Chico in 



paludosis. 



LEPTOBRYUM POTTIACEUM Dusen n. sp. 



PI. IX, Figs. 10-12. 



Dioicnm; vel aliis muscis intermixtum vel dense caespitosum, caespiti- 

 bus expansis, inferne fuscis, superne lutescente viridibus, nitidis. 



PLANTA FEMINEA. Caulis simplex, gracillimus, strictus, usque ad 1.5 

 cm. altus ; folia inferiora et mediana remota, parva, vix 2 mm. longa, 

 lineari-lanceolata vel linearia, superiora raptim longiora, elongate attenu- 

 ata, usque ad 5 mm. longa et basi 0.35 mm. lata, haud decurrentia, sicci- 

 tate plerumque erecta, humiditate e basi erecta arcuato-recurvata, basi 

 medioque canaliculata, apicem versus plana,- marginibus planis, integer- 

 rimis vel superne ob cellulas prominentes remote subserrulatis, nervo 

 rubro, valido, basi c. 0.09 mm. crasso, stricto, infra summum apicem - 

 evanido ; cellules flavae, pellucidae, apicales elongate subrhombeas, ceterae 

 elongatae, omnino rectangulae; bracfae fcricfuetii io\us caulinis similes, sed 

 supremis paulum longiores ; seta tenuis, elongata, usque ad 3 cm. alta, 

 fusco-rubra, nitida, flexuosa ; theca subpyriformis asymmetrica, erecta, cas- 

 tanea, nitida, macrostoma, ore obliquo ; penstomium pallide flavum ; 

 denies exostoinii lanceolati, c. 0.36 mm. alti et basi 0.064 mm. lati, inferne 

 coaliti, linea divisurali distincta, inferne medioque minutissime papillosi, 

 superne papillis subremotioribus et subvalidioribus ornati ; lamellis paucis 

 8-10 instructi; denies endostomii dentibus exostomii aequilongi, hyalini, 



