^o [Grimmia. 



Grimmiace^.] ^^ 



often depressed among the comal leaves, ovate, leptodermous brown 



distinctly striate, 8-costate when dry, calyptra small, mitr^form, hd 



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. 



Hab. — On walls, roofs and rocks ; common. Fr. 3—4- 



Var. /3. obtusa (Brid.) Hueben. 



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

 very short blunt point. 



Syn. — Fissidens pulvinahis var. j3. africanus Hedw. Sp. muse. 159, t. 40, f. 4 6. 

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

 Grimmia pulvinata var. p. obtusa Hueben. Muse. germ. 194. Schimp. Synops. 



Hae. — Exposed rocks. 



St. Vincent's roeks (Thwaites). Conway eastle {yViUon). 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. /8. 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 Bmch. 



Autoicous ; widely pulvinate, grej', 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. — Dryptodon 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 

 (i860), 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.-oiiest 91 (1873), Muse. gall. 134, t. 38 (1887). Juratz. Laubm. oester.-ung. 155 

 (1882). 



Guetnbelia orbicularis Hampe Bot. zeit. 1846, p. 124. Raeenh. 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 



