T Q \Grimmia. 



GRIMMIACE.E.] 



often depressed among the comal leaves, ovate, leptodermous, brown, 



distinctly striate, 8-costate when dry, calyptra small, mitrseform, lid 



purple, from a convex base, crenulate at margin, rostellate ; annulus 



of 4 rows of cells, revoluble ; teeth dark red, longer, slightly perforated, 



unequally bifid at apex. Male infl. gemmaceous, bracts ovate, concave, 



muticous. 



HAD. On walls, roofs and rocks ; common. Fr. 34. 



Var. ft. obtusa (Brid.) Hueben. 



Capsule smaller, on a shorter seta, ovato-globose, the lid obtuse, with a 

 very short blunt point. 



pulvinatus var. ft. africanus HEDW. Sp. muse. 159, t. 4, f- 46. 



Dryptodon obtusus BRID. Bry. univ. i, 198 p.p. 

 Grimmia pulvinata var. ft. obtusa HUEBEN. Muse. germ. 194. SCHIMP. Synops. 



HAB. Exposed rocks. 



St. Vincent's rocks (Thwaites). Conway castle (Wilson). Tickwall, Derby (Hunt 

 1863) ! ! 



This species is generally distributed, and frequent on garden walls, and 

 a form also occurs on dry limestone rocks, with hairs longer than the leaves. 

 The var. ft. has been confounded with G. orbicularis, but that species differs in 

 the calyptra, the large depressed tufts, and leaves with cells uni-stratose 

 at margin. 



12. GRIMMIA ORBICULARIS Bruch. 



Autoicous ; widely pulvinate, grey, hoary. L. lanceolate, carinate, 

 with long hairs, the margin erect, not incrassate. Caps, on an arcuate 

 seta, subglobose, nearly smooth, with a mammillate lid ; calyptra 

 cucullate. (T. XLVIII, D.) 



SYN. Dryptudon obtusus BRID. Bry. univ. i, 198 p.p. 



Grimmia africana ARN. DE NOT. Syllab. 248 (1838). 



Grimmia orbicularis BRUCH. WILS. in Eng. Bot. Suppl. t. 2888 (1844). Bry. br. 154, 



t. 44 (1855). BR. SCH. Bry. eur. fasc. 25 28, p. 13, t. 5 (1845). SCHIMP. Synops. 205 



(1860), 2 ed. 247. BERK. Handb. br. m. 241 (1863). MILDE Bry. Siles. 145 (1869). 



DE NOT. Epil. bri. ital. 692 (1869). HOBK. Syn. br. m. 79 (1873). HUSN. Mouss. 



nord.-ouest 91 (1873), Muse. gall. 134, t. 38 (1887). JURATZ. Laubm. oester.-ung. 155 



(1882). 

 Guembelia orbicularis HAMPE Bot. zeit. 1846, p. 124. RABENH. Deutsch. kr. fl. ii, S. 3, 



167 (1848). C. MUELL. Synops. i, 775 (1849). 

 Grimmia mammillaris POECH in muse, bohem. n. 29. 



Autoicous ; in larger compact swollen hemispherical cushions, 

 falling in pieces when removed, brown at base, olive-green and hoary 

 above. Leaves imbricated when dry, when moist recurved and then 

 erecto-patent, lower small lane., muticous or with a short hair, upper 

 lanceolate, deeply carinate, running out into a long smoothish hair 



