Mr. Hooker's Descriptions of new Mosses from Nepal. 51 L 



biles, penduli, pinnatim ramosi ; rami ut plurimum altcrni, 

 vel raritis second i, hie illic intervallis bi- tri-linearibus se- 

 tuncti, horizontales, circiter pollicares, aliis minoribus simili 

 modo pinnati, fbliosi. Folia laxe imbricata, crecto-paten- 

 ia, obovata, breviter apiculata, valde concava, margine 

 prope apicem in vol u to, caetera piano, ubique integcrrimo, 

 nervo obscuro ante apicem evanescente instructa ; perichcc- 

 tialia erecta, ovato-lanceolata, acutiuscula, paullum modo 

 concava, margine superne revoluta, nervo ad apicem usque 

 attingente percursa ; omnia siccitate longitudinaliter striata. 

 Capsula propemodum sessiles, foliis perichaetialibus im- 

 mersae, ramorum brevissimorum reliquis unmix to rum ad ex- 

 tremitates terminales, globosa3, rufo-fuscae, venis anastomos- 

 antibus eleganter pictse, ora valde contracts?, margine an- 

 gusto, elevato. Operculum planum, aut obsoletissime et 

 obtusissime umbonatum. Peristomium dentibus sedecim 

 obcuneiformibus, luteis, transversim striatis, semper, quan- 

 tum vidi, clausis, et nunquam vel erectis vel rerlexis. 



The capsules of this very singular moss have a remarkably 

 contracted mouth, furnished with a narrow elevated margin, 

 below which the operculum is situated; this is nearly flat, hav- 

 ing an elevation in the centre so slight that it does not reach to 

 ' the edge of the margin. The peristomium, which, on account 

 of its minuteness, is very difficult to examine, has 16 obcunei- 

 form, yellowish teeth placed close together in a horizontal direc- 

 tion, never, as far as I could discern, becoming erect, but re- 

 sembling, in situation as well as in appearance, those of the Fit- 

 naria. I have given this plant the name of P. ambiguum, as I 

 cannot help still regarding it as uncertain to what genus it pro- 

 perly belongs, its terminal sessile capsules, . its operculum, and 

 S its 



