HYPNACE.E.] 123 [Isothecium. 



7. ISOTHECIUM Bridel. 



Bryol. univ. ii, 355 (1827). 



Primary stem creeping, stoloniform, bearing clusters of radicles, the 

 secondary divisions erect and subdendroid by fascicles of pointed, curved 

 branches. Leaves crowded, erecto-patent, imbricate when dry, ovate or 

 ovato-lanceolate, suddenly acuminate, not plicate, serrated or entire, 

 nerved ; cells linear, at excavate angles quadrate or hexagonal, incrassate 

 and opake. Seta smooth, capsule erect or inclined, oblong regular or 

 slightly incurved ; calyptra cucullate, peristome double, teeth united at base, 

 yellow, endostome a basal membrane height of teeth, processes subulate, 

 fenestrate in the keel. Inhabiting bark of trees and stones. Der. icros 

 eqaul, OJ/KT; a capsule. 



CLAVIS TO THE SPECIES. 



Leaves ovate acuminate, serrulate ; capsule inclined. myosuroides. 

 elliptic or obovate, subacute ; capsule erect. viviparum. 



i. ISOTHECIUM MYOSUROIDES (L.) End. 



Dioicous ; in dense spreading, pale or yellowish green tufts. Stem 

 slender, branches fasciculate, often curved to one side ; basal leaves 

 nerveless with long points, stem-leaves from a decurrent cordate-ovate 

 base, lanceolate acuminate, serrate ; capsule erect or cernuous, longish 

 oval. (T. CVIII, A.) 



SYN. Hypnum polyanthon, triangularibus angustis foliis DILL, in RAY Synops. 3 ed. 83 (1724)' 



Hypnum myosuroides tcnuiits capsidis nutantibus DILL. Hist. muse. 317, t. 41, f. 51 (1741) 

 et Herbar. 



Hypnum myosuroides L. Sp. pi. 1130 (1753). HUDS. Fl. Angl. 429 (1762). WEISS Cr. 

 Goett. 259 (1770). WITHER. Bot. arrang. ii, 690 (1776). LIGHTF. Fl. Scot, ii, 765 (1777). 

 RELH. Fl. Cant. 417 (1785). BRID. Muse. rec. II, P. II, 168 (1801), Sp. muse. II, 148 

 (1812), Mant. 165 (1819). SMITH Fl. Brit. 1285 (1804), Eng. Bot. t. 1567. TURN. Muse. 

 Hib. 140 (1804). WEB. MOHR Bot. Tasch. 307 (1807). WAHLENB. Fl. Carpat. 362 

 (1814). SCHWAEG. Suppl. I, P. II, 267 (1816). HOOK. TAYL. Muse. Brit. 102 (1818). 

 HOOK. Fl. Scot. P. II, 144 (1821), Br. Fl. ii, 85 (1833). GRAY Nat. arr. i, 759 (1821). 

 DE NOT. Syllab. 19 (1838). RABENH. D. kr. Fl. II, S. 3, 219 (1848). C. MUELL. 

 Synops. ii, 499 (1851). BERK. Handb. 89 (1863). BOULAY Muse. Fr. 117 (1884). 



Hypnum myosurum SCHRAD. Samml. I, 17 (1796). ROTH Fl. Germ, iii, 302 (1800). 



Isothecium myosuroides BRID. Ery. univ. ii, 369 (1827). HUEBEN. Muse. germ. 604 (1833). 

 BR. SCH. Bry. Eur. fasc. 4647, p. 7, t. 2 (1851). WILS. Bry. Brit. 323 (1855). MILDE 

 Bry. siles. 296 (1869). HUSN. Muse. gall. 334, t; 96 (1893). LIMPR. in RABENH. D. 

 kr. fl. Laubm. iii, 42 (1896). 



Leskea myosuroides HARTM. Skand. fl. 5 ed. 336 (1849). 



