GRiMMiACEiE.l 39 [Griminia. 



undulato-plicate, the margin revolute, apex lingulate-obtuse, entire or 

 usually remotely hyalino-dentate ; nerve broad, thin, vanishing below 

 apex, cells very small, in one stratum, double at upper margin, roundish 

 at apex, the lower linear, strongly sinuose, at angles laxer, quadrate. 

 Perich. bracts smaller, sheathing. Caps, on a dull red seta, erect, 

 oblong or oblongo-cylindric, short-necked, small-mouthed, dull brown, 

 when old black, annulus broad, lid acicular, half length of caps.; teeth 

 dark red, cleft f to base, legs unequal, subulate, connivent when dry. 

 Male infl. terminal, bracts ovate, pointed. 



Hab. — On stones by streams in alpine and subalpine districts. Fr. 3 — 4. 



Common in Scotland, Wales, N. of England, and Ireland. 



Var. y8. denticulata Bf. Sch. 



Plants more slender, the leaves laxer, yellowish green, more laxly 

 areolate, more distinctly toothed at apex. 



Hab. — Sandy detritus by streams, occasionally in the lowlands. 



31. GRIMMIA AaUATICA {Brid.) C. Muell. 



Dioicous ; rigid, in lax yellow-green mats. Leaves from an ovate 

 base, gradually lanceolate, obtuse, muticous, quite entire at apex, 

 recurved at margin. Capsule ovato-cylindric, pale fuscous, lid acicular ; 

 teeth cleft nearly to base into two legs. (T. LI, B.) 



SYN.^Trichostommii aquatkum Brid. Muse. rec. II, P. I, 132, excl. syn. (1798) ? 

 Dicranum aciculare y. gracile Turn. Muse. hib. 67 (1804). 

 Dicranum aquatlcnm Brid. Sp. muse. I, igo, excl. syn. (1806) ? 

 Trichostomum aciculare /3. aquatkum Web. Mohr Bot. Tasch. 192 (1807). 

 Trkhostomumfasckulare (non Schrad.) Moug. Nestl. Stirp. cr. Vog.— rhen. fase. 3, u 



215 (1812). 

 Rhacomitnum aquatkum Brid. Mant. 80, excl. syn. (1819) ? Bry. univ. i, 222, excl. syn 



(1826). LiNDB. Acta soe. sc. fenn. X. 554 (1875). 

 Trkhostomum ackulare fi. acutifolinm W. Arn. in Mem. soc. d'hist. nat. Par. ii, 27 



(1825). 

 Rhacomitnum cataractarum Brid. Bry. univ. i, 776 (1827). De Not. Syllab. 258 (1838) 



HuEBEN. muse. germ. 211 (1833). Aongst. in Fries Summ. veg. sc. 92 (1846). 

 Trkhostomum obtusum Schultz in Syll. ratisb. ii, 144, excl. syn. (1828). Wallr. F1 



cr. germ, i, 176 (1831) ? 

 Trkhostomum protensum Braun MSS. Schultz in Syll. ratisb. ii, 145, in obs. (1828) 



DuBY Bot. gall, ii, 573 (1830). 

 Trkhostomum fasckulare ^. frotensum Hartm. Skand. fl. 2 ed. 321 (1832). 

 Rhacomitnum protensum Braun MSS. Hueben. Muse. germ. 211, ut synon. (1833). Br. 



Sch. Bry. eur, fasc. 25—28, p. 6, t. 2 (1845). Rabenh. Deutsch. kr. fl. ii, S. 3, 156 (1848). 



WiLS. Bry. brit. 166, t. 45 (1855). Hartm. Skand. fl. 7 ed. 375 (1858). Schimp. 



Synops. 229 (i860), 2 ed. 274. Zett. Rev. Grimm, scand. 113 (1861). Berk. Handb. 



br. m. 235 (1863). De Not. Epil. bri. ital. 676 (1869). Milde Bry. siles. 156 (i86g). 



Hobk Syn. br. m. 87 (1S73). HuSN. Mouss. nord-ouest 95 (1873), Muse. gall. 139, 



t. 40 (1887). LiNDB. in Act, soc. sc. fenn. X, S54 (i875)- Juratz. Laubm. oester.-ung. 



177 (1882). Chalub. Grimm. Tatr. go, t. 13 (1882). Boulay Muse. Fr. 363 (1884). 



