Dissodon.] BEYACE^. ^§9 



Hab. On the ground, under the shade of rocks; Sand Lake, New- 

 York (C. R. Peck); near the Profile House and the Dixville Kotch, 

 White Mountains {Foster, James). 



Tkibe IX. SPLACHNE^. 



Plants annual or perennial, gregarious or cespitose, increasing 

 when perennial by subfloral innovations and dichotomously 

 fastigiate. Leaves broadly costate ; areolation composed of 

 large soft parenchyraatose cells. Flowers terminal, monoecious 

 or dioecious, rarely bisexual, the male discoid with large pedicel- 

 late antheridia and clavate paraphyses. Calyptra cucullate or 

 mitrate and split on one side, abruptly constricted at base, 

 rarely conical and entire. Capsule with an apophysis varying 

 in shape and size, erect, regular, long-pedicellate, with free 

 sporangium and persistent columella. Lid convex-conical or 

 hemispherical. Peristome rarely absent, of IG geminate or 8 

 bigeminate linear-lanceolate flat teeth, transversely articulate, 

 minutely punctulate, very hygroscopical. Annulus none. 

 Spores minute. 



1. Calyptra mitriform, constricted at base: apophysis uniform 

 in color., not enlarged icith age. 



66. DISSODON, Grev. & Arn. 

 Leaves obovate or ovate-oblong, spatulate, entire ; cells very 

 loose, shorter in the upper part of the leaves, longer and rect- 

 angular toward the base, thin and a little chlorophyllose. 

 Capsule erect or cernuous, oval, defluent to an obconical collum, 

 on a solid pedicel narrowed at base. Lid convex or conical, 

 obtuse. Teeth of the peristome 16, geminate, linear-lanceolate, 

 acute or truncate, yellowish. Spores large, granulose. 



1. D. Hornschuchii, Grev. & Arn. Stems radiculose : 

 lower leaves small, broadly ovate, distant, the upper close, 

 imbricate, much larger, broadly oblong, narrowly costate, shin- 

 ing green : capsule erect on a short thick pedicel, obovate with 

 the long neck, thick, chestnut-color, very short when deoper- 

 culate and emj^ty, with a broad orifice ; lid persistent upon the 



