Grimmta.-} APLOPERISTOMI. 67 



HAB. On rocks by the sea-shore. 



Proteus-like as is Gr. apocarpa, we cannot agree with Wah- 

 lenberg in supposing this to belong to any one of its varieties. 

 It has a short and peculiarly tufted mode of growth, like that 

 of Gr. pulvinata ; its leaves are narrower than those of Gr. 

 apocarpa, resembling in shape those of Gr. ovata ; but they 

 are more erect than either, never hair-pointed, and decidedly 

 crisped when dry. The perichaetial leaves, too, afford, we 

 think, additional characters ; for they are long, narrow, con- 

 cealing the fruit, and have a remarkably brown, strong, excurrent 

 nerve. The peristome in the last, as in the present species, is 

 sometimes entire ; but more frequently irregularly perforated. 



* * Fruitstalks longer than the leaves. 

 \ Fruitstalks curved, or geniculate. 



3. Gr. saxicola; stems scarcely any, leaves linear-subulate crisped 

 when dry, fruitstalks geniculate, capsule ovate, lid rostrate 

 straight. (TAB. XIII.) 



Grinunia geniculata. Schwaegr. Suppl. v. 1. p. 82. t. 22. Arn. 

 Disp. Muse. p. 19. Funck, Deutschl Moose, t. 11. n. 1. 

 Dicranum Saxicola. Mohr. 

 Weissia geniculata. Brid. Meth. p. 38. 

 Campylopus Saxicola. Brid. Meth. p. 72. 

 Campylopus curvifolius. Brid. Meth. p. 78. 

 HAB. On sandstone rocks in Sussex. Mr. Borrer. On 



granite rocks in the Dublin mountains. 



Mohr does not appear to have seen the calyptra of this 

 species, which is mitriform as in the genus Grimmia, multi- 

 fid at its base, and adhering so closely to the lid as not to be 

 separated without it from the capsule. The stems are shorter 

 than in any of the British Grimmice ; and this circumstance, to- 

 gether with the general shape of the leaves, and minute size of 

 the whole plant, renders it difficult to be distinguished at first 

 sight from Weissia trichodes, among which Mr. Borrer finds it 

 growing. 



It has a still closer affinity with Weissia recurvata, especially 

 in the bent fruitstalks ; but this last mentioned plant has them 

 curved, not geniculate, with leaves shorter and more setaceous. 



E 2 



