HypNACEiE.] 10 [Leskea. 



Leskea catenulata Mitt. Journ. Linn. Soc. i, Suppl. 130 (1859). LiMPR. in Rabenh. D. 

 kr. fl. Laubm. ii, 758 (1895). 



Tkuidium ratenulatum De Not. Epil. 235 (i86g). 



Dioicous; densely csespitose and interwoven, in circular fuscous- 

 green or olivaceous tufts. Stem filiform subpinnate, rigid and brittle, 

 branches ascending, simple and filiform, with small lanceolate 

 paraphyllia. Leaves crowded, patent when moist, julaceously imbri- 

 cated when dry, from a cordate base, lanceolate, entire, nerved to 

 middle, recurved at margin : the cells uniform, pachydermous, forming 

 small oval areolas, smooth on both sides. Perich. bracts pale erect, 

 long-pointed, with elongated cells. Capsule on a pale brown seta, 

 cernuous, finally erect, oblong, subarcuate, yellow-brown, darker on 

 upper surface ; annulus broad, lid yellow, conico-rostellate. Teeth of 

 peristome yellow, densely articulate, processes entire, cilia 2, half their 

 length. Male infl. ovate, the bracts nerveless. 



Hab. — Calcareous rocks and stones in subalpine districts. Fr. 6, very rare. 



Ingleboro' and Penyghent (Nowell 1856) ! ! Limestone wall at Middlehouses, Malham 

 (Nowell 1863) ! ! Den of Airlie (Lyle 1850). Sedgwick, Westmoreland (Stabler 1869) I 

 Clova mountains (Fergusson 1868) ! Ben Lawers. 



A closely allied species L. tecforum (Braun) Lindb. is found in Germany, 

 Switzerland, and Norway. 



2. LESKEA NERVOSA {Brid.) Myrin. 



Dioicous; stem creeping, pinnate with erect branches. Leaves 

 crowded, from a cordate base, ovato-lanceolate, entire, nerve lost in the 

 point. Capsule cylindric, erect, lid obliquely rostellate. (T. LXXXVI, D.) 



SYN.—Ptengynandrum nervosum Brid. Sp. muse. I, 132 (1806), Mant. 128 (1819), Bry. univ. ii, 

 189 (1827). RoEHL. Deutsch. fl. iii, 54 (1813). 



Grimmia cylindracea Web. Mohr Bot. Tasch. 152 (1807). 



Pterogonium nervosum Schwaeg. Suppl. I, P. I, 102, t. 28 (iSii). Funck Moost. ig, 

 t. 13 (1821). 



Leskea norvegica Sommerf. Suppl. Fl. Lapp. 61, t. 11 (1826). 



Maschalocarpus nervosus Spreng. (L.) Syst. Veg. 16 ed. iv, I, 158 (1827). Wallroth Fl. 

 cr. germ, i, 151 (1831). 



Anomodon nervosus Hues. Muse. germ. 561 (1833). 



Leskea nervosa Myrin Coroll. Fl. upsal. 52 (1834). Spruce Ann. Mag. nat. hist. 1849 I 

 289. Br. Sch. Bry. eur. fasc. 44-45, p. 4, t. 3 (1850). Schimp. Synops. 487 (i860), 2 ed' 

 595. De Not. Epil. 245 (1869). Milde Bry. siles. 260 (1869). Hobk. Synops. 2 ed 

 189 (1884). BouLAY Muse. Fr. 167 (1884). Lesq. James Moss. N. Amer. 213 (1884) 

 HusN. Muse. gall. 302, t. 86 (1892). Limpr. in Rabenh. D. kr. fl. Laubm. ii, 7s6 i8qO 

 Dix. James. Stud. Handb. 374 (1896). '^ ^ ^^' 



Hypnum nervosum C. Muell. Synops. ii, 470 (1851). 



