36 GRIMM I A. 



y. rhaptocarpa ; leaves apiculate, points of the same colour j capsule 

 longitudinally striated when old. 



E. rhaptocarpa. Schivaegr. SuppL t. 16. 



HAB. a. On mountains) not uncommon. /3. Scotch alps, 

 Mr. Do?m, and on Ingleborough, Yorkshire, y. On Ben 

 Buiben, Ireland, Mr. Mackay. 



We have, by means of numerous specimens gathered ou 

 the Swiss alps, been enabled to trace the varieties enume- 

 rated to approach so completely to one another, that we 

 have not hesitated to consider them as belonging to the same 

 plant. The teeth at the base of the calyptra are of so fra- 

 gile a nature, that in by far the greater number of specimens 

 they are destroyed ; and hence we find the calyptra of the 

 two varieties p. and y. figured entire. The /3. alpi/ia differs 

 from OL concolor in having its upper leaves principally more 

 acuminated and diaphanous at their points; whilst y. rhap- 

 locarpa may be easily known by its having the capsule when 

 old more or less distinctly striated longitudinally. The teeth 

 of the peristome in this and the preceding species are lan- 

 ceolate, and of a pale red colour. 



15. GRIMMIA, 



GEN. CHAR. Frmtstalks terminal; Perlstome of 16 

 entire or perforated, rarely cleft, equidistant teeth ; 

 Calyptra mitriform. (TAB. II.) 



-This is a genus so closely bordering on Trichosfomum f that it 

 is not possible to form either a natural or artificial character that- 

 may decidedly distinguish them. We have rather retained it in 

 deference to the opinion of preceding botanists, than from a 

 thorough conviction of the propriety of so doing. Grimmia ovata 

 and Grimmia pulvinata have sometimes the teeth divided ) the 

 latter indeed generally. 



* Fruitstalks scarcely any. 



1. Gr.apocarpa; stems branched; leaves ovato- lanceolate, re- 

 curvo-patent, their margins reflexed ; the perichsetial one? 

 having their nerve disappearing immediately below their sum- 

 mits: capsule ovate, sessile; lid shortly rostrate. (TAB. XI 1 1.) 



