126 \Pteroonium. 



Hypnum curvatum SWARTZ Muse. suec. 64 (1799). SMITH Fl. Brit. 1284 (1804), Eng. 

 Dot. t. 1566. TURN. Muse. Hib. 139 (1804). WEB. MOHR Bot. Tasch. 307 (1807). 

 SCHWAEG. Suppl. I, P. II, 267 (1816). HOOK. TAYL. Muse. Brit. 102 (1818). GRAY Nat. 

 arr. Br. pi. i, 758 (1821). HOOK. Fl. Scot. P. II, 144 (1821). RABEN. D. kr. fl. II, f>. 3, 

 291 (1848). 



Leskea curvata VOIT Muse. Herbip. 72 (1812). 



Isothecium r.iyurum BRID. Bry. univ. ii, 367 (1827). HUEBEN. Muse. germ. 602 (1833). 

 BR. SCH. Bry. Eur. fasc. 4647, p. 5. t. i (1851). Wn.s. Bry. Brit. 323 (1855). SCHIMP. 

 Synops. 521 (1860), 2 ed. 629. BERK. Handb. 139 (1863). MILDE Bry. siles. 295 (1869). 

 DE NOT. Epilogo 209 (1869). BOULAY Muse. Fr. 143 (1884). HOBK. Synops. 2 ed. 

 195 (1884). Dix. JAMES. Stud. Handb. 394 (1896). LIMPR. Laubm. iii, 39 (1896). 



Leskea myura BOULAY Muse, de 1'Est 326 (1872). 

 Isothecium viviparum LINDB. Muse, scand. 36 (1879). 



Dioicous ; in spreading pale green glossy tufts. Main stem stoloniform, 

 radiculose, with smaller long-pointed leaves, secondary stems erect, 

 subdendroid or with fascicled branches above unequal in length, subju- 

 laceous. Basal leaves small appressed, long-pointed, nerveless ; branch - 

 leaves erecto-patent, imbricated when dry, longish-ovate, cymbiform- 

 concave, slightly decurrent, margin entire, incurved above, serrulate at 

 point, nerve reaching half-way, sometimes forked; cells linear 7 12 times 

 long as broad, rhomboid at apex, at angles a cluster of roundish 4 5 

 angled cells; middle branch-leaves obovate, pointed, those of ramuli 

 lanceolate, serrate. Perich. bracts lanceolate pointed nerveless, seta 

 straight, purple ; capsule erect, longish ovate, tapering at neck, brown, 

 lid conical with a short oblique beak ; peristome pale yellow, papillose ; 

 endostome whitish, cilia imperfect. 



HAB. Trees and rocks in shade, not uncommon. Fr. 10 u. 



A small slender form occurs, with pale simple branches, found by 

 Mr. Bagnall at Bescote in Warwickshire. 



8. PTEROGONIUM Swarlz. 



Disp. muse. fr. Suec. 26 (1799). 



Primary stem stoloniform, creeping, secondary robust, ascending, 

 branched like a tree, the branches and ramuli arcuato-incurved. Leaves 

 crowded, imbricated, obovate, scariose; nerve forked, reaching middle, 

 cells at base oval, at middle linear, at apex fusiform, all smooth. 

 Calyptra cucullate with scattered hairs, capsule on a long seta, symmetric, 

 teeth of peristome 16, densely articulate, processes of endostome half as 

 long ; inflorescence axillary, gemmiform. Der. wpov a wing and yo>na an 

 angle. 



