BARNES — NORTH AMERICAN MOSSES. 



197 



SCOULERIA, p. 137.1 



Leaves bordered by sligMy larger, thick walled cells, pe- 

 ristome present S. aqnatica,^ 137. 



Leaves bordered by larger denser cells, peristome absent S. marginata, I64. 



GRIMMIA, p. 134. 



Capsule longer than the seta. 



Straight, capsule symmetric 



Crooked, capsule ventricose 

 Capsule shorter than the seta. 



Seta arcuate 



Seta straight 



§n. 



§1. Schistidinm. 

 Gasterogrimmia. 



§111. Engrimmia. 

 §IY. Gnembelia. 



§1. Schistidium. 



Leaves with hyaline points. 



Capsule oblong 



Capsule ovate-globose. 

 Leaves erect or appressed when dry. 

 In small, dense cushions, soft lurid green 

 In lax cushions, coarse, fuscescent. 

 Peristome distinct, orifice dilated 

 Peristome rudimentary, orifice not dilated 

 Leaves spreading when dry 

 Leaves muticous. 

 Margin plane. 

 Entire or slightly serrate at the apex. 



Ovate-oblong, short 



Linear lanceolate 



Coarsely dentate at the apex . . . . 



Margins recurved or revolute 



G- ambigna, 135, 



G. conferta,' 135. 



G. sphaerica, 19i, 



G. apocarpa, 136. 



G. heterophylla, 168. 



G. atricha, 169. 

 G. maritima, 137. 

 G. Agassizii, 136. 



; G. conferta ) 

 : G. apocarpa ) 



vars.* 



I Gfrimmia § Scouleria, L. & J. Man. 137. This genus has lately been revised by Mrs. 

 Elizabeth G. Britton, Bull. Torr. Bot. Club a8: 36. 1895. S. Muelleri Kindb. and 

 S. aquatica catilli/ormis Mlill. are reduced to 3. aquatica Hook. ^S*. Nevii is referred 

 to 8. aquatica nigrescens Kindb. 



' Qrimmia Bcouleri Mtill. See Appendix, no. 163. 



• O. chloroblasia Kindb. (Appendix, no. 167) falls here. See also no, 166. 



* See Appendix, nos. 165, 166. G. platyphylla Mitt. (L. & J. Man. 136) = O. apocarpa 

 latifoUa Zett, sec, Ben. & Card. Bev. Bryol. 19: 85. 1892. A barren species, O. pachy- 

 neurula C. M. & Kindb., Mac. Cat. 65 (see Appendix, no. 170), evidently belongs to this 

 lection. 



