RECENT ADDITIONS TO OUR MOSS FLORA. 387 



■ Stems short ; leaves shortly subulate. 



Glossy yellow-green, about 12 longitudhial 



rows of cells in the lamina G. C. Jlexuosus. 



Dull green, about 16 rows of cells in the 



lamina .7. C. paradoxus. 



§§ Stems free from tomentum. 



Margin of leaf serrulate above 8. C. setifolius. 



Margin of leaf entire 9. C. Schwarzii. 



tt Leaves not auricled. 

 § Stems tomentose. 



Nerve half width of leaf base ; basal cells very 



large, lax, and hyaline 10. C.fragilis. 



Nerve two-thirds width of leaf base ; basal cells 



small, narrow, and hyaline 11. C. Schimperi. 



Nerve one-third width of leaf base; lamina 

 suddenly narrowed at one-fourth length of 



leaf 12. C.pyriformls. 



§§ Stems not tomentose, very short 13. C.hrevlfolius. 



1. C. atrovlrens, De Not. Syllab. Muse. Ital. n. 298 (1838).— D/- 

 cranum atr. C, Miill. Synop. vol. i. p. 414. B. flexiiosmn, y. pilije- 

 rM»2, Turner, Muse. Hib. p. 74 (1804). D.flexuomm,^. n'ujro-vlride. 

 Hook, and Tay. Muse. Brit. C. lomjipilus, Bridel, Bry. Univ. vol. i. 

 p. 477, fro parte; Wils. Bry. Brit. ; Sehpr. Muse. Eur. Nov. fasc. 1 

 and 2. — In veiy densely matted tufts, often of great extent, 1-3 in. 

 high, rufescent, yellowish-green above, becoming brown below, and 

 black at base. Stem erect or ascending, dichotomous, with a few 

 radicles at base of innovations. Lower leaves of stem and innova- 

 tions rather lax, shorter, the rest densely crowded, erecto-patent, Ian- 

 ceolate, very longly subulato-setaceous, channelled below, the wings 

 converging above and tubulose. Nerve continued as a hoary hispid 

 arista of variable length, channelled at back, one-third width of 

 leaf-base, of 4 or 3 strata of narrow cells, those of anterior layer 

 hyaline, the rest narrower and chloi'ophyllose. Cells of auricles di- 

 lated, castaneous, with the central ones colourless, above these sub- 

 rectangular, tlie uppermost oblongo-elliptic. Female flowers 2 or 3 

 at apex of innovations. — Hab. Wet rocks and moorlands in moun- 

 tain districts, Scotland, Ireland, Wales, North of England. This 

 species and C. introjlexus have been confounded by all the older authors, 

 but C. atrovirem may be easily recognized by its lurid colour and struc- 

 ture of the leaf-base ; occasionally the comal leaves are subsecuud. 



3 E 2 



