WE I SSI A. 47 



may here add that the present species is a smaller plant 

 and of a darker reen colour, and has a more decided pe- 

 ri chaeti urn. 



W. controversa ; stems nearly simple ; leaves lineari-subu- 

 late, crisped when dry, their margins incurved ; capsule 

 ovato-^lliptical; lid rostrate. (TAB. XV.) 



W. controversa. Hedw. St. Cr. v. 3. t. 5. Moug. et Nestl n. 16. 

 Bryum virens. Dicks. B. viridulum. Huds. Grimmia controversa. 

 Turn. Muse. Hib.p. 27. Engl. Bot. t. 1367.DUL Muse. t. 48. / 43. 



HAB. Banks, very abundant. 



This plant may be distinguished from W. clrrata by its 

 having the leaves longer and more linear, with their mar- 

 gins by no means recurved ; likewise from W. crispula by 

 the former of these two characters, and from both by the 

 smaller size. We have already noticed the similarity of 

 this plant to Gymnostomum micros tomum, than which it 

 is larger, and has longer and finer fruitstalks. The teeth 

 are of a very pale colour and occasionally split as in the 

 genus Dicr-anum. 



W. calcarea ; steins scarcely any; leaves from a broad base, 

 linear, obtuse, thick, with a very broad nerve; capsule tur- 

 binate ; lid rostrate. (TAB. XV.) 



W. calcarea. Hodw.Sp. Musc.t. 11. f. 1-6. Bryum calcareum. Dicks. 

 Engl. Bot. t. 191. Grimmia calcarea. Turn. Muse. Hib. p. 25. 



HAB. On chalk cliffs and stones. 



The short, upright, rigid leaves of this plant have a striking 

 appearance, and resemble remarkably in miniature those 

 of Pofa/tricham aloides, to which also their dense texture 

 assimilates them, their upper half consisting almost entirely 

 of their broad nerve, which below is much narrower, passing 

 gradually on each side into the broad pagina. 



15. W. recuruata; steins scarcely any; leaves subulate ; capsule 



broadly ovate; fruitstalks curved ; lid rostrate. (TAB. XV.) 

 Grimmia recurvata. Hedw. St.-Cr. v. 1. 1. 38. Turn. Muse. Hib.p. 24. 

 Eaql. Bot. t. 1489. Bryum curvatum. Dicks. 



HAB. On sandstone rocks. 



Thefruitstalk of this plant 'being always arched when grow- 

 ing or after being gathered, when moistened, sufficiently di- 

 stinguishes this plant from W. piisilla. 



16. W. pusilla; stems scarcely any; leaves subulate; capsule 

 ovate ; fruitstalks always erect ; lid rostrate. (TAB. XV.) 



W. pusilla. Hedw. St. Cr. v. 2. t. 29. Bryum paludosmm. Linn. 

 Sp. PL ? Grimmia pusilla. Engl. Bot. t. 2551. 

 HAB. On calcareous rocks, usually. 



