74 CRYPTOGAMIA. 



All the specimens of the collection belong to the male plant, which 

 appears not to have been heretofore described. They are remarkable 

 for having the axis of their branches prolonged, naked, or furnished 

 with distant minute leaflets, and beset at its apex with oblong cylin- 

 drical, articulated, brownish bodies (aerial rootlets, Br. & Sch.), like 

 those on the apex of the leaves of Cah/mperes and Drepanophyllum. 

 Male buds numerous in the axils of the ordinary leaves ; antheridia 

 12-14 linear-oblong, their pedicel rather long; paraphyses few linear. 



Tribe 20. PILOTRICHEiE. 



1. PILOTRICHUM, Brid. 



1. Pilotrichum Vitianum, Sulliv. (Tab. 18.) 



P. mojusculum ; caule repente subterraneo tandem ascendente pinnaiim 

 (raro sub-bipinnatim) ramoso; ramis robustis wderdum apice attenu- 

 atis microphyUis ; foliis rameis spiraliter quinquef arils confertis&imis 

 e basi coarctata oblongis valde cymbiformi-concavis abrupte lineari- 

 acuminatis ecostatis supeme subseiratis, cellulis minute Uneari-fuMfor- 

 mibuSj inferioribus subcrenatis (ccet. non lectis). 



Pilotrichum Vitianum, Sulliv. in Proceed. Amer. Acad. Art. Sci. Jan. 1855. 



Hab. Feejee Islands. — Without flowers or fruit. 



Plant large and somewhat rigid, with bright yellow foliage. Stem 

 4-6 inches long, its lower half simple, horizontal, subterranean, leaf- 

 less ; its upper half suddenly erect, and pinnately branched. The 

 plant is multiplied by flagellse, or stolons from the base of its upright 

 portion, thus having the appearance of a lengthened rhizoma throw- 

 ing up at intervals leafy divisions. Leaves patent-divergent, very 

 closely imbricating in five distinct, spiral rows, oblong, from a con- 

 tracted sub-amplexicaul base, strongly cymbiform-concave, suddenly 

 constricted into a linear, acute, subserrulate point, which forms about 

 one-third of the entire length of the leaf; texture thin and firm, cel- 

 lules very minute, linear, of a uniform size throughout, except at the 



