98 SYNOPSIS OF BRITISH MOSSES. 



teeth very variable, rather long, with a medial liae, 

 strongly papillose. 



Moist limestone banks, walls, &c . 



35. DIDYMODON, Br. and 8. 



1. Monoicous. 



154. D. rubellus, B. and 8. St. j — 1 inch, ceespitose. 

 Lower leaves reddish, upper dull green, all oblong- 

 lanceolate, spreading, papillose on both sides, margin 

 recurved, keeled, nerved nearly to apex. Caps, pale 

 brown, cylindrical, lid with a short, oblique beak. 

 Antheridia naked, in axils of per. 1. 



Shady walls, rocks, banks, &c. October. 



2. Dioicous. 



a. L. lanceolate, rigid. 



155. D. luridus, Hornsch. St. j — 1 inch, csespitose. 

 L. lower ovate-lanceolate, upper oblong-lanceolate, 

 with entire recurved margins, keeled, acute, nerved 

 (reddish) almost or quite to apex, areolae small, round- 

 ish. Caps, symmetrical, oblong, on a shortish seta 

 twisted to the right, lid conical, pointed. Perist. teeth 

 small, irregular. 



Limestone walls, &c. Eare. December. 



b. L. narrow, not rigid. 



156. D. flexifolius, Hook, and Tayl. Barren stems 

 long, trailing, fertile, ^ inch. L. spreading, flexuose, 

 more so when dry, oblong or lignlate, margin reflexed 

 below, and serrate at apex, nerve not reaching apex, 

 areolae round. Caps, small, cylindrical, somewhat 

 curved, lid with a short beak. Perist. teeth short. 



High moorlands. March, April. 



Buxton, Alderley Edge, Ben Ledi, &c. 



Var. GEMMESCENS, Mitt. M8. Nerve excurrent into 



