176 SYNOPSIS OF BRITISH MOSSES. 



81. DIPHYSCIUM, W. and M. 



400. D. foliosum, W. avd M. St. almost none. L. 

 long, narrow, linear, flexuosej with an obscure nerve, 

 margin plane, sometimes toothed near apex; per. 1. 

 with a pale, thin hlade, nerve excurrent into a long, 

 rough bristle, and the innermost divided at apex into 

 long, jointed cilia. Caps, immersed, ovate, oblique, 

 gibbous, lid conical, pointed. Perist. teeth white. 



Shady mountainous rocks. August. 



Tribe xxii. Poltteichacej;. 

 82. OLIGOTRICHUM, De Gand. 



401. 0. hercynieum, Ehr. {incurvtim, Huds., Br. M. 

 FL). St. ^ — 1 inch. L. rigid, erecto-patent, lanceo- 

 late, sheathing, margins inflexed,_ remotely serrate, 

 lamellae of nerve undulate, and spinulose at back. 

 Caps, erect, cylindrical, plicate and oblique when dry, 

 lid conical, pointed. 



Alpine and snbalpine barren soil. June, July. 



Scotland; Todmorden (No well). 



83. ATRICHUM, P. Beauv. 



iCatharinea, Ehr., Br. M. FL] 



a. Monoicous. 



402. A. undulatum, Linn. St. 1 — 2 inches. L. 

 ligulate, margin undulate, thickened, with bi-cuspid, 

 spinulose teeth, which also occur on back near apex, 

 w li ere lamellate nerve ceases. Caps, cylindrical, curved, 

 lid with a long, curved beak. 



Grassy places. Common. October, November. 



Var. /3. MiNOE, Wedw. L. crowded, shorter, less 

 undulate. Caps, suberect, ovate-oblong, unequal, on a 

 shoiter seta. [Br. M. Fl., p. 40.] 



