ToRTULACE^.] 247 [MolUa. 



Hab. — Fissures of limestone rocks at Glena, Killarney, ? ster. {Lind- 

 b6rg,]\i\y, 1873) ! ! 



Although so close to M. hrachydontia, this appears to be a good species, 

 being a coarser fragile plant with the cells in the upper part of leaf much 

 better defined. 



Sect. 3. TORTELLA. C. Muell. Plants taller, robust, dense-leaved 

 throughout. Leaves long, carinate, cirrhato — crispate when dry, the 

 sheathing base thin, white, and hyaline. Peristome sometimes twisted. 



18. MOLLIA TENUIROSTRIS [Hook. Tayl.) Lindb. 



Dioicous ; in lax soft bright green tufts. Leaves long, cirrhate, 

 flexuoso-patulous, linear-lanceolate, subundulate, nerve ending in the 

 apex. Caps, narrow, cylindric, lid conico-rostrate, teeth linear-lanceo- 

 late. (T. XXXVI, B.) 



Syn. — Weissia tenuirostris Hook. Tayl. Muse. brit. 2 ed. 83, suppl. t- 3 (1827). Hook. Br. 

 fl. ii, 21 (1833). Mack. F1. hibern, P. 11, 14 (1836). 



Weissia cylindrica Bruch MSS. Brid. Bry. univ. i, Suppl. 806 (1827). Nees Hornsch. 

 Bry. germ, ii, P. II, 58, t. 29, f. 13 (1831). De Not. Syllab. 232 (1838). 



Weissia cirrata j8. cylindrica Hueben, Muse. germ. 127 (1833). 



Didymodon tenuirostris Wils. in Hook. Bot. J. iii, 378 {1841). HusN. Muse. gall. 80, t. 

 22 (1885). 



Didymodon cylindricus (non Wahlenb.) Br. Sch. Bry. eur. fasc. 29 — 30. mon. 5, t. 3 

 (1846). Rabenh. Deutseh. kr. fl. ii, S. 3, 102 (1848). Wils. Bry. brit. 108, t. 33 

 (1855). ScHiMP. Synops. 132 {i860), 2 ed. 164. Berk. Handb. br. m. 265 (1863). De 

 Not. Epil. bri. ital. 563 (1869). Hobk. Syn. br. m. 59 (1873). HusN. Mouss. nord- 

 ouest. 69 (1873). Lesq. James Mosses N. Amer. 105 (1884). 



Trichostomum cylindricum (non Hedw.). C. Muell. Synops. i, 586 (1849). Milde Bry. 

 siles. 100 (i86g). Juratz. Laubm. oesterr.-ung. 104 (1882). 



Tortula cylindrica Mitt. Journ. Linn. soe. i, suppl. 28 (1859). 



Trichostomum tenuirostre Lindb. De Tort. 225 (1864). 



Tortula tenuirostris Mitt. Journ. Linn. soc. Bot. xii, 148 (1869). 



Mollia tenuirostris Lindb. Muse, scand. 21 (1879). 



Dioicous ; in flat, lax, soft tufts, yellow green or sometimes dark 

 lurid green above, rufescent or fuscous at base. Stems i — 2 in. high, 

 flexuose, bifid or trifid by innovation. Leaves rather lax below, 

 becoming more crowded, longer and comant upward, very long from an 

 erect base, flexuoso-patulous, when dry strongly twisting and cirrhate, 

 linear-lanceolate, channelled, undulate, wings fragile, strongly verru- 

 culose, margin minutely crenulate, occasionally with a few remote teeth 

 at apex, cells at base lax pellucid, gradually and equally becoming 

 oblong and oval, above roundish-quadrate, opake ; nerve terete, 

 narrow, prolonged into the apex. Perich. bracts with a longer 

 sheathing base ; caps, on a slender reddish-yellow seta, erect, lepto- 

 dermous, narrowly cylindric, pale brown ; lid pale red, conico-rostrate, 



