HYPNACE^E.] 177 \Isopterygium. 



The two forms of this moss have been so confounded by the older botanists 

 that it is hardly possible to separate them, and there is no doubt they were regarded 

 as synonymous, while by some later authors they have been maintained as distinct 

 species. In the typical plant the leaves are shorter, and quickly narrow into very 

 fine points ; in the variety they run out gradually into the acumen, and their cells 

 also are longer and wider ; in both the capsule becomes more horizontal when ripe. 

 Dickson's figure of the magnified leaf clearly belongs to some other moss, having 

 a single nerve to the apex, and is useful as a caution to beginners to secure a 

 perfect plant for examination, as intermixture has often led to mistakes. 



6. ISOPTERYGIUM REPENS (Poll.) Lindb. 



Autoicous ; stems procumbent, with few fasciculate-arcuate branches. 

 Leaves laxly imbricated, secund, ovato-lanceolate, acuminate, serrulate, with 

 two faint nerves at base. Capsule with a long neck, subcylindric, curved, 

 cernuous ; lid conic. (T. CXVII, A.) 



Sn-s. Hypnum repens POLLICH Hist. pi. palat. iii, 167, t. I (1777). LAM. Enc. meth. Bot. iii, 181 

 (1789). LAM. DE C. Fl. Franc. 3 ed. ii, 537 (1805). DE C. Synops. pi. gall. n. 1381 

 (1806), et Fl. Franc. 3 ed. v, 234 (1815). DUBY Bot. gall, ii, 562 (1830). 



Leskea Seligeri BRID. Muse. rec. II, P. II, 47 (1801). 



Hypnum Silesiacum SELIGER MS. P. BEAUV. Prodr. 70 (1805). WEB. MOHR Bot Tasch. 



UT (1807). ROEHL. Deutsch. fl. iii, 119 (1813). SCHWAEG. Suppl. I, P. II, 287, t. 94 



(1816). FUNCK Moost 65, t. 49(1821). HUEBEN. Muse. germ. 611 (1833). DE NOT. 



Syllab. 5 (1838), Epilogo 189 (1869). RABENH. D. kr. fl. II, s. 3, 273 (1848) WILS. Bry. 



Brit. 405, t. 59 (1855). BERK. Handb. 129 (1863). HOBK. Synops. 160 (1873). BOUL. 



Muse. Fr. 88 (1884). 



Hypnum (Stereodori) Silest'acus BRID. Bry. univ. ii, 554 (1827). 

 Hypnum Seligeri (non BRID.) C. MUELL. Synops. ii, 259 (1851). 

 Plagiothecium Silesiacum BR. Sen. Bry. Eur. fasc. 48, p. 12, t. 6 (1851). SCHIMP. Synops. 



581 (i860), 2 ed. 703- MILDE Bry. Siles. 317 (1869). HUSN. Muse gall 354, t. IO2 



(1893). Dix. JAMES. Stud. Handb. 434 (1896). LIMPR. in RABENH. D. kr. fl. Laubm. in, 



289(1897). 



Plagiothecium Seligeri LINDB. in Bot. Not. 1865, p. 144. 

 Plagiothecium repens LINDB. in Not. Saells. Fn. Fl. fenn. iv, 36 (1867). 

 Isopterygium (Dolichotheca) repens LINDB. Muse. Scand. 39 (1879). 



Autoicous; in lax procumbent pale green tufts, slightly glossy. 

 Stems creeping, with incurved fasciculate branches, rooting at base. 

 Leaves indistinctly complanate, secund, ascending, concave, lanceolate- 

 acuminate, squarrosely patent or recurved, uppermost secund, longish- 

 lanceolate, acuminate, serrulate in upper half, nerve forked, short 

 none ; cells longish at base, at angles few, oval hyaline. Pench. brae 

 suddenly elongated into a subulate serrated recurved point ; seta r 

 capsule smooth, cernuous, cylindric, curved, reddish-brown, wide at mouth 

 lid conic obtuse; peristome pale yellow, processes not perfo, 



23- 



H \B. On rotten trees and humus, rare. Fr. 45. 



Abbeywood, Kent (Mitten ,843) > ' Arncliff wood, Eskdale (Spruce ,8 47 ). Aden's v 

 Kent (Howse). 



