HvPNACEiE.] 29 [Amblystegium. 



12. AMBLYSTEGIUM RIPARIUM (L.) Bv. Sck. 



Autoicous ; laxly tufted ; stems long, flaccid, vaguely branched. 

 Leaves patent, subcomplanate, oblong-lanceolate, entire, nerved above 

 middle, cells 10 — 15 times long as broad. Capsule oblongo-cylindric. 

 (T. LXXXIX, D.) 



Syn. — Hypnum ripariiim L. Sp. pi. ii2g (1753), Syst. nat. 11,704. HuDS. Fl. angl. 427 (1762). 

 Weiss Cr. goett. 250 (1770). Neck. Meth. muse. 184 (1771). Wither. Bot. arr. Br. 

 veg. ii, 301 (1776). LiGHTF. Fl. scot, ii, 760 (1777). Weber Spic. fl. goett. 80. Relh. 

 Fl. cant. 415 (1785). Roth Fl. germ, i, 470 (1788). Sibth. Fl. oxon. 301 (1794). 

 HoFFM. Deutsch. Fl. ii, 77 (1796). Hedw. Muse. fr. iv, 7, t. 3 (1797), Sp. muse. 241 

 (i8oi). Abbot Fl. Bedf. 250 (1798). Hull Br. fl. P. 2, 273 (1799). Swartz Muse, 

 suee. 63 (1799). Brid. Muse. rec. II, P. II, 176 (1801), Sp. muse. II, 112 (1812), Mant. 

 157 (i8ig), Bry. univ. ii, 415 (1827). Smith Fl. brit. 1292 (1804), Eng. bot. t. 206a. 

 Turn. Muse. hib. 152 (1804). Schultz Fl. starg. 334 (1806). Web. Mohr Bot. 

 Tasch. 331 (1807). Voit Muse, herbip. iii (1812). Schwaeg. Suppl. I, P. II, 194 

 (1816). Hook. Tayl. Muse. br. 92 (1818). Hook. Fl. scot. P. 2, 141 (1820). Funck 

 Moost. 56, t. 37 (1821). Gray Nat. arr. i, 752 (1821). Hueben. Muse. germ. 619 (1833). 

 De Not. Syllab. 4 (1838). Rabenh. D. kr. fl. II, S. 3, 293 (1848). C. Muell. 

 Synops. ii, 321 (1851). Wils. Bry. brit. 364 (1855). Berk. Handb. br. m. g8 (1863). 

 Hobk. Synops. 164 (1873). Boulay Muse. Fr. 76 (1884). Lesq. James Moss. 

 N. Anier. 376 (1884). Dix. James. Stud. Handb. 452 (1896). 



Amblystegium riparlum Br. Sch. Bry. eur. fasc. 55 — 56, p. 14, t. 8 (1853). Schimp. 

 Synops. 597 (i860), 2 ed. 717. Milde Bry. siles. 328 (i86g). De Not. Epilogo 146 

 (i86g). Hobk. Synops. 2 ed. 213 (1884). R- i>u BuYSS. Etud. Gen. Amblys. 18 (i88g). 

 HusN. Muse. gall. 363, t. 104 (i8g3). , 



Stereodon riparius Mitt. Journ. Linn. Soc. viii, 43 (1864). 



Autoicous ; in lax soft depressed tufts, bright or yellowish green, 

 very variable in size. Stem long, creeping, flaccid, vaguely branched ; 

 leaves somewhat crowded, widely spreading, often subcomplanate, 

 rarely subsecund, shortly decurrent, broadly ovato- or oblongo- 

 lanceolate, longly and slenderly acuminate, quite entire, nerved above 

 middle, upper cells linear-rhomboid, to — 14 times long as wide, at base 

 lax and rectangular. Perich. bracts longish subvaginant, outer spreading 

 from the middle, inner elongated, bisulcate erect, with a thin nerve. 

 Capsule horizontal, incurved, arcuate, oblongo-cylindric, pale ferruginous; 

 lid large, orange, conical; teeth yellow, cilia appendiculate. Male infl. 

 thick, bracts ovate, acuminate. 



Hab. — On stones and wood by streams and ditches ; common. Fr. 6. 



Var. /3. longifolium Schultz. 



Robust, stems elongated ; leaves complanate, large patulous, distant, 

 lanceolate, attenuated into long points, yellowish green. 



SVN. — Hypnum longifolium Schultz Fl. Starg. 335. Brid. Sp. muse. II., 114, Mant. 158. 

 Hyp. riparium S. longifolium Brid. Bry. univ. ii, 414. 

 Amblystegium riparium r). longifolium Schimp. Bry. eur. 



Hab. — In pools and overflowed fields. 



