ACOTYLEDONS.- Musci. Orthotrichum. 137 



* Peristome without ciliary processes. 



1. O. anomalum, leaves lanceolate erecto- patent, fruitstalks ex- 

 serted, peristome of 8 double teeth, calyptra slightly pilose. 

 Muse. Brit. p. 72. f. 21. 



HAB. Rocks and walls. 



2. O. cupulatum, leaves lanceolate erecto-patent, capsule nearly 

 sessile, peristome of 16 double teeth, calyptra slightly pilose. 

 Muse. Brit. p. 72. /.21. 



HAB. Trees and stones. 



** Peristome with 8 ciliary processes. 



3. O. crispum, leaves lanceolato-subulate much crisped when 

 dry, fruitstalks much exserted, capsule striated, peristome with 

 8 ciliary processes, calyptra very pilose. Muse. Brit. p. 73. /. 21 . 



HAB. Trees and stones. 



4. O. Hutchinsice,\eaves lanceolate erect and nearly straighrwhen 

 dry, fruitstalks much exserted, capsule striated, peristome with 

 8 ciliary processes, calyptra very pilose. Muse. Brit.f>.73~t.2l. 



HAB. Rocks and stones, Lorn and Appin, Capt. Carmichael. 



5. O. affine, leaves patent broadly lanceolate, capsules sessile, 

 peristome with 8 ciliary processes, calyptra subpilose. Muse. 

 Brit. p. 74. t. 21. 



a. mqfus, stems elongated, calyptra, especially above, pilose. 



O. affine, Schrad. 

 /3. p2imilum } stems very short, calyptra glabrous. 0. pumilum, 



HAB. Common on rocks and trees, both a. and /3. 



*** Peristome with 16 ciliary processes. 



6. O. diaphcmum, stems short, leaves lanceolate acuminated their 

 points diaphanous, capsule sessile, peristome with 16 ciliary 

 processes, calyptra subpilose. Muse. Brit. p. 74. t.2l. 



HAB. Stone walls, rocks and trees. 



7. O. pulehellum, stems short, leaves patent narrow-lanceolate 

 crisped when dry, fruitstalks exserted, peristome with 16 slen- 

 der ciliary processes, calyptra subpilose. Muse. Brit. p. 75. t. 21 . 



HAB. Trunks of trees and stones, Lorn, Capt. Carmichael. Trees near 

 Dalkeith, G. Don. Rosslyn, Arlary, &c. Mr. Arnott. 



8. O. rivulare, stems elongated much branched, leaves broadly 

 lanceolate obtuse, capsules sessile, peristome with 16 slender 

 ciliary processes, calyptra glabrous. Muse. Brit. p. 75. t, 21. 



HAB. Stones in the Cart and in the burn at Calderwood, D. Don. 



9. O. striatum, stems elongated branched, leaves lanceolate pa- 

 tent slightly twisted when dry, capsule sessile ovate smooth, 

 peristome with 16 torulose ciliary processes, calyptra subpilose. 

 Muse. Brit. p. 75. Polytrichum siriatum, Lightf.p.7Q4. 



HAB. Trunks of trees. 



10. 0. Lyelliij stems elongated much branched, leaves long linear 

 lanceolate recurvo-patcnt much crisped when dry, capsule ob- 



