HvPNACEiE.] 176 \Isopterygium. 



Hypnum Sendtmri (non Schp.) C Muelu Synops. ii, 394 (1851). 



Plagiothedum pukhellum Br. Sch. Bry. Eur. fasc. 48, p. 9, t. 4 (1851). Schuip. Synops. 

 578 (i860), 2 ed. 693. HoBK. Synops. 160 (1873). Hdsn. Muse. galL 353, t. 101 (1893). 

 Dix. James. Stud. Handb.433 (l8g6). Lihpr. in Rabenh. D. kr. fl. Laubm. iii, 276 (1897). 



Hypnum rutilans WiLS. Bry. Brit. 404 in obs. (1855). 



Stereodon pulchtllus Mitt. Joum. Linn. Soc. viii, 39 (1864). 



Plagiothedum mlidum war. suberedum Limdb. in Bot. Not 1865, p. 145, et in Not. ur Saells. 

 Fn. Fl. fenn. foerh. 1867, p. 34. Miij>e Bry. Siles. 316 (1869). 



Plagiothedum nitidulum var. /3. pukhellum Ltn-db. in Skand. fl. 10 ed. ii, 24 (1871). 



Isopletygium nitidum var. /!. puldiellum Lindb. Muse, scand. 39 (1879). 



Autoicous ; in small dense yellowish-green glossy tufts. Branches 

 densely radiculose at base, ascending or erect, often slightly incurved 

 and subcomplanate. Leaves crowded, secund, subfalcate, lanceolate- 

 acuminate, fine-pointed, nerveless, concave ; cells very narrow, at basal 

 angles a few longish and rectangular. Perichaetium radiculose, the 

 bracts erect and sheathing, lanceolate, acute ; seta reddish ; capsule almost 

 erect, oblongo-cylindric, rufescent ; lid convex-conic, muticous ; teeth con- 

 fluent at base, pale yellow, inner on a high membrane ; the processes 

 perforated, cilia two. Male infl. gemmiform ; bracts ovate, acute. 

 Hab. — Crevices of rocks in subalpine districts ; not rare. Fr. 6 — 8. 



Ben Lawers, Lochnagar and most of the Scotch mountains. Miller's dale (Hunt'). Teesdale 

 {R. Barnes) ! ! Frequent in the North Riding of Yorkshire. 



Var. p. nitidum ( Wahlenb.) 



Plants more robust, prostrate ; the leaves cotnplanate, rarely secund, broader, 

 longer, with more finely acuminate points. Capsule cernuous, ovate, reddish- 

 brown, widely truncate when empty. 



Syn. — Leskea nitida Wahlenb. MSS. Web. Mohr Index musei pi. or. (1803), Bot. Tasch. 

 344 (1807). 



Hypnum nitidulum Wahlenb. FI. Lapp 370 (1812), excl. syn. 



Hypnum pukhellum Sm. Eng. Bot. t. 2006. C. Muell. Synops. ii, 277 (1851). Wils. Bry. 

 Brit. 403, t. 25 (1855). 



Plagiothedum nitidulum Br. Sch. Bry. Eur. fasc 48, p. 10, t. 5 (1851). Schimp. Synops. 

 579, 2 ed. 694. lIoBK. Synops. 2 ed. 20g (1884). 



Stereodon nitidulus Mitt. Journ. Linn. Soc viii, 39, in obs. (1864). 



Plagiothedum nitidum Lindb. in Fries Bot. Not. 1865, p. 145, et Not. ur Saells. Fn. et Fl. 

 fenn. foerh. ix, 34 (1867). 



Plagiothedum Amoldi Milde Bry. Siles. 318 (1869). 



Isopterygium nitidum Lindb. in Not. Saell. Fn. Fl. fenn. xiii, 416 (1874). 



Plagiothedum puldiellum var. /}. nitidulum Lesq. James Moss. N. Amer. 364 (1S84). Dix. 

 James. Stud. Handb. 433. 



Hab. — In moister places on rotten trees and rocks in limestone districts. 



Cronkley fell, Teesdale {Sprua 1843) ' Rattand Clough, Todmorden {Nowell i860) ! ! 

 Heseltine Ghyll, Yorks. (Whiteheeut 1861). Corrie of Boquhan burn, Stirling {Kidslon 

 1896)!! 



