ORTHOTRICHIEI. 227 



d. Teeth sixteen ; cilia sixteen of a double series of cells, eroded 

 at the sides, minutely papillose. 



17. O. leiocarpum, Br. Schimp. ; stems rather tall, 

 loosely tufted ; leaves spreading, recurved, erect or patent 

 when dry ; lanceolate ; margin revolute ; fruitstalk very short ; 

 sporangia large, obovate, soft, even ; veil hairy. Hook, fy 

 Wils. t. xxi. ; Ertg. Bot. t. 2187. ; (Plate 20, fig. 8) ; Moug. $ 

 Nest. n. 324. 



On trees, pales, and stones. Bearing fruit in spring. 



Forming green tufts or patches. Sporangium immersed, 

 ovate, with a short neck, pale-yellow, without strise, even and 

 slightly contracted below the orifice when dry ; lid shortly 

 rostrate ; teeth often bifid, revolute when dry ; cilia deeply 

 eroded ; spores ferruginous. 



This is the old O. striatum, a very inappropriate name in 

 the present condition of the genus, inasmuch as it is the only 

 European species with an even sporangium. It applied, how- 

 ever, originally to the veil, not to the sporangium. 



18. O. Lyellii, Hook, fy Toy I. ; dioicous; stems elongated, 

 pulvinate; leaves almost squarrose, flexuous, erect, twisted 

 when dry, linear-lanceolate ; fruitstalk exserted ; sporangium 

 oblongo-pyriform, striate ; veil hairy; cilia broad, carinate. 

 Hook. Wils. t. xxii. ; Eng. Bot. t. 2834. ; (Moug. fy Nest, 

 n. 619). 



On trunks of trees. Rare. Bearing fruit in summer. 



Forming large, yellowish-green, loose tufts. Stems matted 

 below with rootlets ; leaves clothed with cylindrical papillae 

 and brown confervoid threads ; vaginula slightly hairy ; lid 

 shortly rostrate ; cilia sixteen, red, subtrabeculate, eroded at 

 the margin ; spores large, green. 



Schimper gives as follows what he believes to be the affini- 

 ties of the species : 



Q 2 



