K|. 



G R I M M I A. 37 



. toigro-viridis ; foliis latioribus, nigro-viridibus. 



Gr. apocarpa. Hedw. St. Cr. v. I. t. 39. Turn. Muse. Hib. p. 20. 

 JZngl. Bot. t. 1 134. Moug. et Nestl. n. 1 7- Grimmia alpicola. Swartz 

 Muse. Suec. t. 1. Hedw. Sp. Muse. t. 15. Grimmia alpicola /?. and y. 

 IVahl. Fl. Lapp. Grimmia rivularis. Bridelin Schrad. Journ. v. 5. t. 3. 

 Turn. Muse. Hib. p.2l.t. 2.f. 2. Schwaegr. Sp. Muse. Suppl part. ]. 

 t. 23. Grimmia gracilis. Schwaegr. Sp. Muse. Snppl. t. 23. Grimmia 

 apocaula. Hoff>n,Moug. et Nestl. n. 18. Dill Muse. t.32.f. 4. 



ft stricta ; caule elongate, foliis angustioribus rufescentibus. 



Grimmia slricta. Turn. Muse. Hib. p. 20. t. 2.f. 1. 



HAB. Var. a. on trees and on rocks in humid places, as 

 well as in alpine rivulets. (3. On rocky places in elevated 

 mountains. 



i We heartily accord with Bridel when he says of this spe- 

 cies <c adeo diversiformis et pro sedis conditione ita varians 

 ut verus Proteus sit." Upon trees and on humid rocks the 

 stems vary much in length, and are from one to two or three 

 inches long, usually every where clothed with leaves ; these 

 leaves moreover are at their summits not unfrequently ter- 

 minated by diaphanous points; from which slight differences, 

 added to the more or less branched habit, have arisen the 

 Grimmia alpicola and the Gr. apocarpa of authors. When 

 growing on rocks in mountain streams its length is still 

 greater, the branches somewhat more fastigiate, the leaves 

 decayed at the base, every-where of a darker colour, and 

 never furnished with diaphanous points; hence the Gr. ri- 

 vularis : whilst on elevated mountains a variety has been 

 found, (the Gr. stricta of Mr. Turner,) whose slender, often 

 straight and brittle branches, and red-brown colour, might 

 at first lead to the suspicion of its being a distinct species ; 

 but its leaves differ in no essential particular, and the cap- 

 sule in all the varieties is liable to no small degree of dif- 

 ference in form, being more or less ovate, but sometimes, 

 especially when the lid has fallen, turbinate. The Gr. gra- 

 cilis of Schvvaegrichen we rather refer to our var. a. on ac- 

 qount of its colour. Wahlenberg has considered the Gr. 

 stricta and Gr. rivularis as varieties of his alpicola 9 and 

 has separated them all from Gr. apocarpa by their want of 

 the diaphanous points to the leaves. 



2. Gr. maritima; stems short, pulvinate; leaves lanceolate, acu- 

 minate, nearly erect, crisped when dry, their margins re- 

 curved, the perichaetial ones with their nerve running beyond 

 the summits; capsule ovate, sessile; lid shortly rostrate. 

 (TAB. XIII.) 



Gr. maritima. Turn. Muse. Hib. p. 23. /. 5./.2. Eitgl. Bot.t. 1645. 

 Gr. alpicola S. Wahl. Fl Lapp. 



