CESIA. 405 



(Sowerby, Eng-. Bot. 2220). 2. Ditto. ,'}. Portion of fertile 

 stem X 24 (Snowdon, W. H. P.). 4. Portion of barren stem x 

 24 (ditto). 5-7. Leaves x 24 (ditto). 8-10. Ditto (Mael 

 Tarmachan, C. J. Wild). 11. Portion of leaf x 290 (Snowdon, 

 W. H. P.). 12-14. Bracts x 64 (ditto). 15. Perigonial 

 bract X 24 (Mael Tarmachan, C. J. Wild). 16. Ditto (Glen 

 Finnan, Dr. Carrington). 



8. Cesia obtusa, Llndh. 



Cesia ohtusa, Lindb. Muse. Scantl. p. 'J (1S7'J). 



Gymnomitrmm concinnata7n, var. crenulatum, Limpr. in Cohn Krypt. Schles. 1 , 

 p. 24G (1877)? 



Dioicous, densely csespitose, small, silvery white, where ex- 

 posed and old it is darker coloured, where shaded it has a greenish 

 tinge. Stems erect when tufts crowded, with few branches 

 assurgent, ascending to the height of the chief stem, when tufts 

 loose, stem prostrate, creeping, fertile stems increasing in size to 

 apex, which is blunt and swollen, barren shoots catenulate, on 

 a transverse section almost round, cortical layer of cells firmer and 

 darker coloured ; rootlets few, hyaline, short, arising from the 

 postical side of stem where the two series of leaves join, 

 ascending to about the middle of the stem, the leaves having to be 

 carefully separated from the stem before the origin of the rootlets 

 can be seen. Leaves closely and regularly imbricate, erect, 

 hilarious, ovate, roundish-ovate or obovate, concave, bidentate to 

 \ or J, sinus acute or slightly rounded, segments broad, obtuse, 

 finely crenulate on both sides, lower margin of leaf quite entire ; 

 texture somewhat fleshy, cells medium size to smallish, roundish- 

 quadrate or roundish- oblong, marginal cells smaller, trigones 

 small but very distinct. No stipules. Bracts larger than the 

 leaves, broadly ovate, bidentate to about \, segments obtuse, 

 finely crenulate. Innermost bracts free, very delicate, ovate, 

 laciniate-dentate or denticulate ; bracteole small, oblong-quadrate, 

 laciniate-dentnte or denticulate. Pistillidia lew (about 8), oblong, 

 dispersed over the calyptra. Male stems slightly clavatej 



