Hypnace^.] 54 [Amblystegium. 



Stems elongated, rather rigid, dull yellowish-green, growing in deep 

 water, pinnate with short acute branches. Leaves remote, erect or patent, 

 the apical convolute in a point, oblong-lanceolate, gradually narrowed into a 

 long acute acumen, nerve f the length, angular cells occupying nearly all 

 the base. 



Hab. — Strensall common, York [Holt 1886) ! ! 



In concluding this most protean group, I have availed myself largely of 

 the writings of Sanio, who has elaborated the group with the greatest 

 acumen, but I have not accepted his minute sub-division of the forms, for 

 without type specimens it would only be a hindrance to students to employ 

 four or five names to each form. I have no doubt these will be largely 

 augmented by a close investigation of each locality, coupled with the amount 

 of rainfall, nature of subsoil, and variability of season. I look upon the cell 

 structure of the base and angles of leaf, with the presence of plicae in 

 leaves and perichaetial bracts as of prime importance and I consider that the 

 dioicous or autoicous arrangement of the inflorescence to be not a matter of 

 indifierence in these or any other mosses. 



Sect. 4. SCORPIDIUM Schimp. Plants tall, branches erect, fastigiate, 

 with few ramuli.- Leaves turgidly secund-imbricate, broad, obtuse, soft, 

 nearly nerveless, with very narrow cells. 



31. AMBLYSTEGIUM SCORPIOIDES (L.) Lindb. 



Dioicous ; in lax rufous or black tufts, erect or procumbent, 

 irregularly pinnate. Leaves dense, imbricated, secund, ovate-oblong, 

 shortly acuminate ; the margins incurved ; nerve faint, single or double. 

 Capsule oblong-cylindraceous, arcuate. (T. XCVII, C.) 



Syn. — Hyfnum scorpioides palustre magnum Lycopodii instar sparsum D:ll. Hist. muse. 290, t. 

 37, f. 25 (1741) et Herbar. 



Hypnum scorpioides L. Sp. plant. 1127 (1753). HuDS. Fl. angl. 424 (1762). Wither. 

 Bot. arr. ii, 686 (1776). Lightf. Fl. scot, ii, 754 (1777). Relh. Fl. cant. 412 (1785). 

 Roth Tent. fl. germ, i, 469 (1788). Hoffm. Deutsch. fl. ii, 63 (1795). Swartz Muse, 

 suec. 58 (1799). Abbot Fl. Bedf. 249 (1798). Hull Br. fl. p. 2, 271 (1799). Hedw. 

 Sp. muse. 295 {1801). Smith Fl. brit. 1326 (1804), Eng. Bot. t. 1039. Turn. Muse, 

 hib. 187 (1804). ScHULTz Fl. Starg. 328 (1806). Web. Mohr Bot. Tasch. 372 (1807). 

 Roehl. Deutsch. fl. iii, 117 {1813). Brid. Sp. muse. II, 209 (1812), Mant. igi (1819), 

 Bry. univ. ii, 637 (1827). Schwaeg. Suppl. I, P. II, 293 (1816). Hook. Tayl. Muse, 

 brit. 112 (1818). Hook. Fl. scot. P. 2, 148 (1821). Gray Nat. arr. i, 765 (1821). 

 HuEBEN. Muse. germ. 697 (1833). De Not. Syllab. 48 (1838), Epilogo 169 (1869). 

 Rabenh. D. kr. fl. II, S. 3, 269 (1848). C. Muell. Synops. ii, 418 (1851). Schimp. 

 Bry. eur. fasc. 57—61, p. 44, t. 30 (1854), Synops. 650 (i860), 2 ed. 796. Wils. Bry. 

 brit. 400 (1855). Berk. Handb. 127, t. 11, f. 5 (1863). Milde Bry. siles. 350 (i86g). 

 HoBK. Synops. 180 (1873). Boulay Muse. Fr. 19 {1884). Lesq. James Moss. N. Amer. 

 406 (1884). HusN. Muse. gall. 393 (1894). Dix. James. Stud. Handb. 486 (1896). 



Hypnum squarrosum Timm Fl. megap. 827 (1788). 

 Hyp. lycopodioides p. Neck. Meth. muse. 168 (1771). 



