120 HANDBOOK OF BRITISH MOSSES. 



prostrate, pinnato-ramulose; branchlets falcate; leaves crowded, 

 circinato-falcate, lanceolate with a subulate tip, plicate, 

 toothed ; nerve reaching above halfway ; sporangium subcy- 

 lindrical, arcuate, cernuous ; lid conical. — Hook. §• Wils. t. 

 xxvi. ; Eng. Bot. t. 1600. ; (Plate 1 1, fig. 1) ; Moug. % Nest, 

 n. 335. 



In watery, stony places in alpine or subalpine districts, but 

 not in marshes. Bearing fruit in summer. 



Forming pale yellowish-green tufts or patches, varying 

 much in length. Stem suberect or prostrate, slender, slightly 

 branched ; the branches more or less pinnate, the branchlets 

 falcate above; leaves crowded, falcate, secund, broad at the 

 base, striate, lanceolate with a subulate, curved, toothed apex ; 

 nerve slender, reaching more than halfway ,- cells very narrow, 

 loose at the base, especially at the. clasping angles; perichsetial 

 leaves very long, nerved, striate ; fruitstalk even, 1 inch long, 

 reddisb ; sporangium subcylindrical, curved, cernuous, or sub- 

 erect ; lid conical, acute ; ring distinct. 



The monoicous inflorescence, paler colour, more rigid stem, 

 more falcate, decidedly toothed, sulcate leaves, which are 

 broader at the base, and the elongated, subcylindrical sporan- 

 gium distinguish this from H. aduncum. It is, however, ex- 

 tremely variable according to the situation in which it grows, 

 and its greater or less subjection to moisture. 



67*. H. exannulatum, Gurnb. ; dioicous ; stem erect or 

 procumbent, pinnate; leaves secundo-uncinate, auriculate; 

 nerve reaching to the tip ; perichsetial leaves even, shortly 

 acuminate ; sporangium curved ; lid shortly conical ; ring 

 wanting. — Bryol. Eur. t. 620. 



In watery places, Cheshire. Bearing fruit in early summer. 



Distinguished from H. uncinatum by the dioicous inflores- 

 cence, exannulate sporangium, and other points. 



