HYPNACE^E.] 183 ^Plagiothecium. 



Hypnum denticulatum var. silvaticum TURN. Muse. Hib. 146, t. 13 (1804). SMITH FL Brit. 

 1289 (1804). ROEHL. Deutsch. fl. iii, 99 (1813). BOUL. Muse. Fr. 85 (1884). 



Plagiothecium silvaticum BR. SCH. Bry. Eur. fasc. 48, p. 14, t. II (1851). SCHIMP. Synops. 

 585 (1860), 2 ed. 700. BERK. Handb. 131 (1863). MILDE Bry. Siles. 319 (1869). DE 

 NOT. Epilogo 187 (1869). LESQ. JAMES Moss. N. Amer. 368 (1884). HUSN. Muse. Gall. 

 351, t. 101 (1893). Dix. JAMES. Stud. Handb. 437 (1896). LIMPR. in RABENH. D. kr. fl. 

 Laubm. iii, 258 (1897). ' 



Dioicous ; stronger than denticulatum, in loose dingy green tufts,, 

 scarcely glossy, stoloniferous ; branches suberect, complanate, dense-leaved 

 at base. Leaves longer, ovate and ovato-lanceolate, the lateral asymmetric, 

 short-pointed, the margin slightly reflexed at base ; nerve strong, forked,, 

 reaching \ length ; cells laxer, the primordial utricle serpentinely con- 

 tracted, at basal angles rectangular. Perich. bracts erect, inner sheathing, 

 with a short lanceolate point ; seta red ; capsule cernuous or horizontal,, 

 cylindric, slightly curved, reddish-brown, striate ; lid conic, with a long 

 beak ; peristome yellow, basal membrane of endostome \ its length, cilia 

 2 3. Male infl. ovate, scattered along the stem and branches. 



HAB. Damp woods, among rocks and tree-roots ; not uncommon. Fr. 9. 

 Var. ft. Roesii (Hampe) Lindb. 



Smaller than the type, brighter green and more glossy. Leaves less com- 

 planate, concave, with very short nerves and laxer cells. Capsule erect oval ; lid 

 conic, obtusely acuminate. 



SYN. Hypnum Roesii HAMPE MSS. 



Plagiothecium Roeseanum SCHIMF. Bry. Eur. I.e. t. IO, Synops. 584, 2 ed. 699. LIMPR. 



Laubm. iii, 261. 



Plagiothecium denticulatum var. myurum Bry. Eur. I.e. t. 8, f. e 1-7. 

 Plagiothecium Sullivantice SCHIMP. Bry. Eur. I.e. p. 16 in obs. 

 Hypnum Sullivantice SULL. Moss. U.S. p. 80 (1856), et Icones muse. 207, t. 126 (1864). 



PI silvaticum var. cavifolium JUR. in RABENH. Bryoth. no. 765. Var. y. Roesii LINDB. irv 

 HARTM. Skand. fl. 9 ed. (1864) et in Bot. Not. 1865, p. 143- 



PI. silvaticum var. myurum MOLENDO Algau. Alp. 98 (1865). 



HAB. Sandy soil in alpine woods ; rare. Fr. 8. 



Kirkstone Pass, Westmoreland (Stabler 1876) ! 



Var. y. orthocladum (Br. Sch.) 



Plants shorter; branches crowded, erect, fastigiate. Leaves crowded and 

 scarcely complanate, wider and suddenly ending in a short apiculus. 

 SYN ._ Plagiothecium orthocladum BR. SCH. Bry. Eur. fase. 48, p. IS, t. 10. 



Plagiothecium silvaticum var. orthocladum SCHIMP. Coroll. 115, Synops. 585. LIMPR. 

 Laubm. iii, 262. 



HAB. Among grass and stones near the sea at Dunnet, Caithness (Rev. D. 

 Li I lie 1901). 



