31 



Tctraphis rigida Hed. fil. Obs. bot. i, 7, T. I (1802). Wahlene. F1. suec. ii, 770 (1826). 

 SwARTz Adnot. bot. 82 (1829). Myrin in W. Ak. Handl. 183 1, p. 261. 



Orthotrichum Brownianum Sm. F1. Brit, iii, 1269 (1804). Brid. Sp. Muse. P. 2, 11 (1812). 



Grimmia Browniana Turn. op. c. i, 522, in nota (1805). Sm. Eng. Bot. t. 1422 (1805). 



Tetraphis Browniana Grev. F1. Edin. 230 (1824) ; Scot. Crypt. Fl. iii, t. i6g (1826). W.- 

 Arn. 1. t. Brid. Bry. univ. i, 133 (1826). Hook. T. op. c. 2 ed. 33 (1827). N. H. St. 

 op. c. g. Wallr. op. c. iiS. HuEBEN. Op. c. 74. DuBY Bot. gall, ii, 577 (1830). 

 Hook. Br. Fl. ii, 14 (1833). Mackay Fl. Hib. P. 2, 12 {1836). Hampe in Regens. bot. 

 Zeit. XX, P. 1, 280, n. i. cum Var. ovata {1837). Hartm. op. 1-. 5 g edd. (1849-64). 



Tctrodontium Brownianum ScHWGN. op. cit. ii, P. I, 102, t. I2g (1824). MouG. Nest. St. 

 Cr. n. 811. Br. Schimp. Bry. Eur. iii, Mon. 4, t. 2 (1843). Aongstr. in Fr. Sumtn. 

 Veg. Sc. i, 92 (1846). WiLS. Bry. brit. 197, t. 8 (1855). ScHiMP. Synops. 283 {i860) ; 

 et 2 ed. 351 (1876). Berk. Handb. Br. M. 216, t. ig, f. 7 (1863). Milde Bry. Siles. 245 

 (i86g). HoEK. Syn. Br. M. gg (1873). 



Tctrodontium ovatiim Schwgn. op. c. ii, P. I, 102. 



Georgia Browniana C. Muell. Syn. i, 181 (1848). Rabenh. Deutsch. Krypt. Fl. ii, P. 3, 

 231 (1848). Spruce Trans. Bot. Soc. Edin. iii, 153 (1849) ; et Ann. Mag. N. Hist. 2 

 Ser. iii, 359 (1849). Lindb. in Not. ur Sallsk. Fn. et Fl. fenn. 151 (t867). 



Tctrodontium varinvi a. foliatum et /8. frondiferum Lindb. in Ofr. V. Ak. Forh. XX, 414 

 (1863). 



Autoicous ; plants very small, simple, gregarious, radiculose at base, 

 with very short decumbent stems, bearing the terminal inflorescence. 

 Radical frondiform leaves long, linear-cuneate or somewhat palmate 

 at apex, of 2-3 layers of cells ; or else bearing flagelliform branches 

 covered with lanceolate, entire, nerveless leaves. 



Perichsetial bracts numerous, imbricated, outer much smaller, 

 all ovato-lanceolate, faintly nerved at base, entire, the cells oval, 

 capsule solitary, on a rigid purple pedicel, erect, oval, symmetric, 

 firm, olive-brown, becoming blackish by age ; calyptra covering all 

 the capsule, glossy reddish-brown, more deeply slit, unequally plicate ; 

 operculum one-third length of capsule, dull yellow, conic or rostellate ; 

 mouth of capsule exannulate, more or less emarginate opposite the 

 interspaces between the teeth ; teeth shorter and broader than in 

 G . pellucida ; spores greenish-yellow. Male- infl. gemmiform, the bracts 

 fewer, oval, pointed, nerveless, paraphyses short. 



Hab. — Sandstone and gritstone rocks, not very uncommon in Scotland, 

 N. of England, and Ireland. Fr. 7. 



On rocks by the river at Rosslin, Edinburgh (Brown). Bilston burn (Manghan). Kirk- 

 caldy {Chalmers). Arniston and Auchindenny woods (Greville and Arnott). Rae hills 

 woods, Dumfries (Sardine). 



Common in Yorkshire as at Keb Clough, Todmorden {Nowell 1848) ! ! Rigg mill and _ 

 Goathland beck, Whitby (Braithwaite) ! ! Cronkley gill (Spruce) ! Healy hall, ' 

 Rochdale (Hobson). Ripon (Brunton). Dene at Twizell House, Berwick {Greville), 

 and Lyham Dene (Boyd). Cornwood cascade and Fox-tor, Devon [Holmes). Hays 

 wood, Meavy (Fl. dev.). Ardingly, Sussex (Davies). 



Jrel, — Head of Kelly's glen, Dublin, and near Ballycastle, Antrim (Moore 1835). Lough 

 Bray (Fl. Hib.). " , 



TetrapMs ovata Funck is a state in which the radical frondiform leaves 

 are short or altogether wanting. 



TetrapMs repanda Funck is only a variety of G. Bnwnii, having the 

 mouth of capsule slightly more emarginate, and sending from the roots 



