122 HANDBOOK OF BRITISH MOSSES. 



Forming green tufts. Stems more or less clothed with 

 branched rootlets; branches simple or pinnate; stem-leaves 

 deltoideo-ovate, branch-leaves ovato-lanceolate, all secund, 

 more or less acuminate, serrate ; nerve strong, reaching almost 

 to the tip, sometimes excurrent; cells loose, especially at the 

 base ; fruitstalk about an inch long, even ; sporangium oblong, 

 curved, cernuous ; lid conical, acute. 



Varying much in size, ramification, and general habit, but 

 distinguished easily from the last by the leaves not being 

 twisted when dry, and by their larger cells. The branched 

 down in this and the last species seems rather to be of the 

 nature of rootlets than a modification of leaves (paraphylla) 

 as in H, brevirostre and its allies. 



70. H. rugosum, Hedw. ; dioicous ; stem ascending, stout, 

 irregularly divided ; branches pinnate ; branchlets recurved ; 

 leaves crowded, falcato-secund, ovato-lanceolate, acuminate, 

 falcate, toothed, corrugated ; nerve reaching about halfway ; 

 sporangium subcylindrical, curved, cernuous; lid shortly ros- 

 trate. Hook. <Sf Wils. t. Iviii.; (Moug. ty Nest. n. 231.) 



Oh exposed rocks, on heaths and sand-hills, principally in 

 subalpine districts. Bearing fruit in summer. 



Forming tawny or yellowish-green tufts. Stem erect or as- 

 cending, slightly divided; branches pinnate; pinnae sometimes 

 however confined to one side ; leaves rather crowded, secund, 

 falcate, transversely corrugated, ovato-lanceolate, acuminate, 

 concave, sharply toothed; those on the branchlets often 

 erecto-patent ; margin recurved; nerve reaching about half- 

 way, slender ; fruitstalk an inch or more long, even, red ; 

 sporangium oblong, slightly curved when fresh ; lid with a 

 short oblique beak. 



A noble species, rarely bearing fruit, and not likely to be 

 confounded with any other, but somewhat resembling H. ly- 



