184 SYNOPSIS OP BEITISH MOSSES, 



Section III. PLEUEOGAEPI. 

 Trihe xxv. Leuoodontacke. ■ 

 Fam. 1. Leptodontse. 

 92. LEPTODON, Mohr. 



423. L. Smithii, Dicks. St. 1 — 3 inches^ creeping., 

 Branches pinnate or bipinnate. L. ovate, rounded and 

 obtuse at apex, bisulcate, entire, margin recurved 

 helow on one side, nerved more than half way, apical 

 cells small, rotund, basal, rhomboid, rectangular ; per, 

 1. erect, ovate, subulate. Caps, elliptical, horizontal, on 

 a short, curved seta, lid with a straight beak. 



Trees. April. 



Devon, &c. 



Fam. 2. Leueodontse. 

 93. PTEROGONIUM, Swartz. 



424. P. gracile, Bill. Ehizome creeping, with 

 arcuate stems, and incurved, fasciculate branches. L. 

 spreading (appressed when dry), ovate, concave, acute, 

 serrate near apex, margin not recurved, slightly two- 

 nerved at base. Caps, oblong, elongate, small-mouthed. 

 Perist. fragile, lid conical, short, not rostrate. 



Shady subalpine rocks and walls, and trees. Spring. 



94. LEUCODON, Scliw. 



425. L. scinroides, Linn. St. or branches 1 inch, 

 from a creeping rhizome. L. patent, when dry secund 

 or imbricate, ovate-lanceolate, entire, tapering to a 

 point, plicate, somewhat secund ; per. 1. longer, all 

 nerveless. Caps, ovate-oblong or elliptical, erect, lid 

 conical, beaked. 



Trees, walls, rocks, &c. Spring. 



