74 ORTHOTRICHUM. 



and very nearly the peristome of 0. crispum, yet differs es- 

 sentially from it in the leaves, which bear a close resem- 

 blance to those of O. anomalum, are of the same brownish 

 colour, and nearly as erect when dry as when in a moist 

 state. The fruitstalks, which are quite as much exserted as 

 in the last-described species, are often twisted. The peri- 

 stome only differs from that of the preceding in having its 

 eight teeth, when recurved, deeply and regularly cleft down 

 the middle. 



5. 0. affine; leaves patent, broadly lanceolate ; capsules sessile; 



peristome with eight ciliary processes ; calyptra subpilose, 

 (TAB. XXI.) 



a. majus. Stems elongated ; calyptra, especially above, pilose. 



O. affine. Schrad. SpiciLp. 67. Turn. Muse. Hib. p. 96. Engl. Bot^ 

 1, 1323. Schwaegr. Suppl. t. 49. (under the name of O. striatum.) (X 

 mjrestre. Schwaegr. Suppl. t. 53? Dill. Muse. t. 55. f. 10. 



/3. pumilum. Stems very short ; calyptra glabrous. O. pumilum, 

 Swartz Muse. Suec. t. 4.f. 9. Dicks. Turn. Muse. Hib. p. 98. Engt. 

 Bvi. t. 2168, Schwaegr. Suppl. .50. 



HAB. Trunks of trees and old pales, common. 



Since we have been unable to discover any other mark of 

 distinction between 0. nffine and G.pumihim, than the 

 smaller size of the latter, and its glabrous calyptra, (which ! 

 even in the former is at most but slightly pilose,) we cannot 

 do otherwise than look upon them as varieties of the samei 

 species. We have quoted doubtfully the O. rnpestre of j 

 Schwaegrichen, in which he has represented the ciliary pro- 

 cesses very broad at the base, not filiform, as in our plant. 



The stems vary from half an inch, or even less, to an inch 

 or more in height, and are in proportion to their size more ! 

 or less branched. The peristome consists of eight teeth, j 

 marked with three faint longitudinal lines, but we have! 

 never seen them split even when recurved. The ciliary j 

 processes are always eight. 



* * * Peristome with } 6 ciliary processes. 



6. 0. diaphamim \ stems short; leaves lanceolate, acuminated, \ 



their points diaphanous ; capsule sessile; peristome with 16; 

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



O. diaphanum. Schrad. Spicil p. 69. Dicks. PL Crypt, fasc. t. 10. } 

 f. 12. Turn. Muse. Hib. p. 99. /. 1. Engl. Bot. t. 1324. Schivacgr.l' 

 Suppl. t. 55. O. aristatum. Turn: Muse. Hib. p. 100. t. 9./. 2. 



HAB. On trees, walls, roofs, and pales. 



An extremely common species, distinguished readily 

 enough by the diaphanous points of the leaves. 



