Hypnace^.] I 8s [Acrodadium. 



Syn. — Muscus ramosus palustris major, foliis membrauaceis aattis Ray Synops. stirp. Brit. 2 ed. 

 39 (1696). 



Hypnum repens palustre foliis triangularibus per caules expansis extremitatibus convolutis et 

 acuminatis Dill. Cat. Giss. 219 (171S). 



Hypnum palustre, extremitatibus cuspidaiis et pungeniibus Dill. Hist. muse. 300, t. 39, f. 34 

 (1741) et Herbar. 



Hypnum mspidatum L. Sp. pi 1127 (l7S3). HuDS. Fl. Angl. 428 (1762). Neck. Meth. 

 muse. 163 (1771). Wither. Bot. arrang. ii, 688 (1776). Lightf. Fl. Scot, ii, 761 (1777). 

 HoFFM. Deutsch. Fl. ii, 58 (179S). Roth Fl. Germ, i, 471 (1788). Sibth. Fl. Oxon. 300 

 (1794). Hedw. Sp. muse. 354 (1801). Brid. Muse. rec. II, P. II, 86 (1801), Sp. muse. 

 II, 120 (1812), Mant. 159 (1819), Bry. univ. ii, 562 (1827). Sm. Fl. Brit. 1317 (1804), 

 Eng. Bot. t. 2407. Turn. Muse. Hib. 117 (1804). Schultz Fl. Starg. 317 (1806). 

 Web. Mohr Bot. Tasch. 339 (1807). Wahlenb. Fl. Lapp. 381 (1812), Fl. Carpat. 360 

 (1814). RoEHL. Deutseh. Fl. iii, 105 (1813). Schwaeg. Suppl. I, P. II, 208 (1816). 

 Hook. Tayl. Muse. Brit. 100 (1818). Hook. Fl. Scot. P. 2, 146 (1821). Funck Moost. 

 59, t. 41 (1821). Gray Nat. arr. Br. pi. i, 762 (1821). Hueben. Muse. germ. 653 (1833). 

 De Not. Syllab. 44 (1838), Epilogo 169. Rabenh. D. kr. fl. ii, s. 3, 289 (1848). Wils. 

 Bry. Brit. 375 (1855). C. Muell. Synops. ii, 383 (1851). Br. Sch. Bry. Eur. fase. 57— 61, 

 p. 51, t. 36 (1854). ScHiMP. Synops. 644 (i860), 2 ed. 789. Berk. Handb. Br. m. 108, t. 8 

 (1863). MiLDE Bry. Siles. 370 (1869). Hobk. Synops. 179 (1873). Boul. Muse. Fr. 17 

 (1884). Lesq. James Moss. N. Amer. 403 (1884). Husn. Muse. Gall. 418, t. loi (1894). 

 Dix. James. Stud. Handb. 490 (1896). 



Stereodon cuspidatus Mitt. Journ. Linn. Soc. viii, 42 (1865). • 



Acrodadium cuspidatum Lindb. Muse, seand. 39 (1879). Limpr. in Rabenh. D. kr. fl. 

 Laubm. iii, 567, fig. 434 (1899). 



Calliergon cuspidatum Kindb. Eur. & N. Amer. Bryin. 8l (1897). 



Dioicous ; in lax yellow-green glossy tufts ; stem suberect, rigid, 

 pinnate, with two rows of unequal branches, all pointed by the convolute 

 leaves, and in section consisting of lax cells with a bark of three rows 

 of minute purple incrassate cells, and an outer cuticle of one layer of 

 large hyaline cells. Stem-leaves crowded, broadly ovate, obtuse,' concave ; 

 margin entire, incurved above ; nerves two, very short or none ; cells 

 narrow, flexuose, at the impressed basal angles lax, hyaline, oval and 

 angular. Perich. bracts erect, multiplicate ; seta purple ; capsule hori- 

 zontal, cylindraceous, gibbous, rufescent above, greenish-yellow beneath ; 

 lid conical, pointed ; annulus of 3 — 4 rows of cells, peristome yellow, 

 cilia 2 — 3. 



Hab.— Marshy ground; common. Fr. 5 — 6. 



Var. /3. pungens Schimp. Synops. 644. 



Plants more slender and fragile, pale olivaceous ; stem-leaves less decurrent, 

 imbricated ; branches subulate, with convolute leaves. 



Hab.— Watery places. Jackdaw crag, Tadcaster {Wesley 1879) ! I Walton near Preston, Lanes. 

 {Beesley 1901) ! 1 



Var. 7. fluitans Klinggr. Leb. und Laubm. West- und Ostpr. 294. 



Stems very long and floating, dark green, flaccid; leaves distant, spreading 

 as if distichous. Resembling Ambl. Kneiffii. 



Hab. — Floating in pools. Peat hole, Brookhouse bog near Manchester {Holt 1893). 



