ORTHOTRICHUM. 



75 



O.pulcliellum; stems short; leaves patent, narrow-lanceolate, 

 crisped when dry; fruitstalks exserted; peristome with 16 

 slender ciliary processes; calyptra subpilose. (TAB XXI.) 

 O. pulchellum. Engl Bot. t. 1/8?. 

 HAB. On trunks of trees. 



This species, which seems unknown on the continent, 

 was first distinguished by the late Mr. Brunton, who found 

 it in the north of England. We have collected specimens 

 on the mountains near Dublin, and Mr. Hobson has met 

 with it near Manchester. In size it scarcely exceeds the 

 preceding; but its exserted fruitstalks, lighter colour, and 

 crisped leaves, without the long diaphanous points, afford 

 abundant marks of distinction. The colour of the outer 

 teeth is of a fine red, and very unlike in this particular the 

 rest of the genus. 



0. rivulare , stems elongated, much branched ; leaves broadly 

 lanceolate, obtuse ; capsules sessile ; peristome with 16 slen-? 

 der ciliary processes ; calyptra smooth. (TAB. XXI.) 



O. rivulare. Turn. Muse. Hib. p. 96. t. 8. Engl Bot. *.2188. 



HAB. Rocks and streams. 



O. rivulare vies with O. striatum in size, but has the 

 leaves shorter, obtuse, and the cilfary processes of a very 

 different nature, being filiform, and arising from the sides 

 of the teeth. It appears to be unnoticed by the Continen- 

 tal muscologists, though found with us in various parts of 

 the kingdom. The mouth of the capsule is furnished with 

 16 teeth standing in pairs. 



0. striatum ; stems elongated, branched ; leaves lanceolate- 

 patent, slightly twisted when dry; capsule sessile, ovate, 

 smooth; peristome with 16 torulose ciliary processes ; ca- 

 lyptra subpilose. (TAB. XXI.) 



O. striatum. Hedw. St. Cr. v. 2. t. 36 ? Turn. Muse. Hib. p. 95. 

 (excluding the var. 0.) Engl. Bot. t. 2187. Schwacgr. Suppl. t. 54. 



HAB. Usually on trees. 



The stems vary considerably in length, and are exceeded 

 by none but those of 0. Lyellii. The inner fringe is of a 

 very peculiar structure, broad, very pale coloured, and com- 

 posed of moniliform joints, usually in single rows, but not 

 unfrequently other joints are attached to the sides of these, 

 as represented in our figure. Moreover, these cilia do not 

 arise from the sides of the exterior teeth as in most of the 

 other species, but originate below their sinus, and from a 

 different and an interior membrane, as in Hypnum. This 

 configuration does not appear to be accurately represented 



