0RTH0T1UCHIEI. 225 



Forming dense yellow-green cushions or patches. Veil 

 straw-coloured with a brown tip, slightly hairy ; sporangium 

 yellow-brown, with very prominent orange striae, cylindrical 

 and contracted below the orifice when dry; interstices some- 

 times transversely wrinkled ; lid short, blunt ; teeth orange ; 

 cilia sixteen, nearly equal in length, rarely eight; base of 

 leaves hyaline with obloug cells, which are almost confined to 

 the disk; tip often slightly eroded. 



13. O. Sprueei, Mont. ; monoicous; stems short, tufted; 

 leaves slightly spreading, erect and imbricated when dry, 

 oblongo-spathulate or oblong, apiculate, flaccid, obscurely 

 nerved; margin nearly plane; sporangium pyriform, widely 

 striate ; veil naked ; lid short, subconical ; teeth in eight 

 pairs ; cilia sixteen or eight. — Hook, fy Wils. t. xlv. 



On trees near rivers. Occasionally from the Clyde to the 

 Thames. Bearing fruit in early summer. Not found at pre- 

 sent on the Continent. 



Forming short tufts. Stems sparingly branched ; leaf-cells 

 large, not papillose ; sporangium half immersed. 



The leaves in this curious species have no tendency to be 

 lanceolate ; the apex is rather blunt, with a little apiculus ; 

 the margin is widely reflexed ; the leaf-cells are much larger 

 than in most species, not papillose, and those at the base do 

 not differ greatly from the others in length; the nerve in the 

 lower leaves reaches scarcely above the middle and vanishes 

 below the apex in the upper. 



14. O. rivulare, Turn. ; stems elongated, decumbent, or 

 pendulous ; leaves spreading, flaccid, loosely imbricated when 

 dry, ovato-lanceolate, obtuse; margin recurved; sporangium 

 pyriform, widely striate ; veil naked ; teeth in eight pairs, re- 

 flexed when dry ; cilia sixteen. — Hook. Sf Wils. t. xxi. ; Eng. 

 Bot. t. 2188. ; (Moug. $ Nest. n. 824.) 



Q 



