CESIA. 403 



Description of Plate CLXXVII. — Pig. 1. Plants natural 

 size. 2. Portion of stem x 24 (Norway, Boeck). 3-8. Leaves 

 X 24 (G. II. Hep. Eur. n. 513. 9. Leaf x 85 (Ilusn. Hep. 

 Gall. n. 52). 10-12. Young leaves x 24 (Ben Lawers, S. M. 

 Macvicar). 13. Portion of leaf x 290 (Norway, Boeck). 

 Perigonial bracts x 24 (Ben Lawers, S. M. Macvicar). 



14. 1.' 



'. Cesia concinnata (Z/j/////!) G. S^- B. 



'Sfi (1777). 



Cesius coiicimiatics, Gr. &, Benn. Nat. Arr. Brit. PI. 1, p. 70;") (1821). 

 Gymnomitrium concinnatum, Cord, in Sturm Fl. Germ. Or. 10, 20, p. 2;5 (18^50) ; 



Nees Nat. Eur. Leberm. 1, p. 115 (1833). 

 Acolea concinnata, Dum. Syll. Jung. p. 76 (1831). 

 Cesia concinnata, Lindh. Muse. >Scand. p. 10 (18711). 



Dioicous, closely caespitose, small, of a silvery green colour. 

 Stems suberect, simple or ramose, cylindrical, about 15 cells in 

 diam., filiform below, towards the apices incrassated and com- 

 pressed, when dry brittle ; radiculose, rootlets ascending to apex. 

 Leaves erect, bifarious, loosely imbricate, somewhat secund, 

 concave, ovate, bidentate to about J,, sinus acute, segments acute, 

 margin quite smooth, often hyaline; texture firm, epidermis 

 smoothish, cells smallish, roundish-quadrate or roundish-oblong, 

 walls distinct, trigones small but distinct. No stipules. Bracts 

 bifid or trifid, somewhat similar to the upper leaves, innermost 

 bracts smaller, two or three, free, irregularly laciniate-dentate, 

 very delicate. Calyptra ovate, extremely delicate, cell structure 

 hardly visible, arranged like a spider's web ; pistillidia dispersed 

 over it. Capsule small, nearly spherical, of a reddish shining 

 brown colour. Spores spherical, deep fulvous brown colour. 

 Elaters similar in colour, bispiral. 



Male stems somewhat clavate ; perigonial bracts terminal, 

 broadly ovate, swollen at the base, antheridia about 8, 1 or 2 at 

 the base of each bract, almost spherical, bearers long, of 24 cells 

 in two rows. 



Fruits May, June. 



