358 
Br. Sellowianum Montevidense proximum foliis anguste 
subulatis acutatis prima fronte recedit. — Flores maseuli 
in vieinia feminei plerumgque binati brevissime stipitati 
gemmulam tenellam clausam apiee patulam minutam si- 
stentes, foliis minutis convolutaceo-vaginatis ovatis brevis- 
sime acuminatis. — Pulvinuli rigidissimi compressi in 
rupibus adpressi. 
Trib. XVI. Orthotrichaceae. 
Gen. Orthotrichun Hdw. 
129. Orthotrichum (Euorthotrichum) Lorentzi n. sp.; 
monoicum; cespites humiles Iuteo-virentes laxi; caulis 
apiee in ramos breves plures fastigiatim divisus; folia 
caulina laxe imbricata madore patula, e basi decurrente 
ereceta parum reflexa robustula oblongo-acuminata, acu- 
mine brevi recto vel curvulo terminata, integerrima, mar- 
gine ubique summitate excepta valde revoluta, profunde 
“ eanalieulata, nervo angusto carinato ante acımen evanido 
pereursa, inaequalia, e cellulis grossis rotundis in series 
dispositis valde chlorophyllosis luteo-viridibus firmiusculis 
nec inerassatis tenuiter papillosis infima basi parallelo- 
grammis longiusculis angustis lIutescentibus areolata; 
perch. caulinis similia strietiora sed basi laxe pellucide 
reticulata; theca in ped. apicem versus incrassato luteo 
molli flaceido flexili ereeta breviter exserta, e collo lon- 
giusculo eylindraceo -oblonga leniter 8-plicata olivacea, 
leptoderma operculo ochraceo basi aureo cupulato reete 
rostellato, ealyptra fructum omnino fere obtegente pilosula 
fuscata basi vix laeiniata et vix plicata; perist. robustum 
latum pallescens rugulosum duplex: dentes ext. bigeminati 
lato-lanceolati apice vix fissiles truneatuli arcte conflati 
