28 SYNOPSIS OF BEITISH MOSSES. 



longer and dendroid. L. from a sheathing membranous 

 base, patent, rarely subsecund, scarcely dififerent when 

 dry, elongate-lanceolate or Ungulate, nerve very broads 

 occupying nearly the whole lamina, with many lamellas, 

 margin more or less sharply serrate. Caps, ovate- 

 globose, not angular, erect or cernuous, when dry and 

 empty' spherical or cyathiform, lid convex, with an 

 upright beak, sometimes concave when dry. Calyptra 

 densely covered with hairs reaching below its base. 

 Perist. as above. 



85. Polytrichum, Dill. PI. taller, erect. St. simple, 

 ligneous, radiculose. L. lower squamiform, upper 

 from a sheathing membranous base, horizontally 

 spreading ; nerve broad, dilated and occupying the 

 width of the leaf above, covered with numerous lamellae, 

 sometimes excurrent into a bristly point ; margin 

 either incurved and entire, or plane and sharply serrate. 

 Caps, on a long seta, upright, when dry horizontal, 4 

 or 6-angled, on a discoid or subglobose apophysis, lid 

 large, convex or conical, with an upright or oblique 

 beak. Perist. of 64, rarely 32 short teeth. Calyptra 

 with long ^rhitish or brownish hairs covering the whole 

 capsule. 



Section 2. GLADOGABPL 

 Fruit terminal on a branch. 



Tribe xxiii. Fontinalace^. 



PI, floating. L. tristichous, or in 5 — 8 rows, cells 

 prosenchymatous or parenchymatous. Fl. laterally 

 inserted among the leaves. Caps, generally immersed, 

 perist. double, ext. of 16 long linear teeth transversely 

 articulate ; int. cilia either quite free, or united into a 



