HYPNACEiE.] 175 \Isopterygium. 



Hae. — Shady banks and rocks, not uncommon. Fr. 3 — 4. 



Bantry c. fr. {Miss Hutchins). Ardingley rocks, Sussex c. fr. {Mitten) ! ! Sittingly rocks, 

 Wakehurst c. fr. {ffeuuings 1855). Tore waterfall {Taylor 1843) ! 1 Eridge rocks, 

 Tunbridge Wells {Mitten). Woods at Castle Howard {Spruce) ! I Hill Cliff and Orford, 

 Warrington {Wilson). Todmorden {NoweU) ! ! Gibson's wood, Heptonstall {Nowell 

 184s) ! ! Trevaylor valley, Penzance c. fr. {Marquand 1880) ! ! Arthog, Barmouth c. fr. 

 {Whitehead 1876) ! ! Wetherby, Yorks. {Wesley) ! ! Reisgill burn, Caithness {Rev. D. 

 Lillie 1898) ! ! Bromley, Kent {Cocks 1899) ! ! 



Var. p. Schimperi {Jur. &■ Milde) Limpr. Krypt. fl. Schles. i, 83. 



fei dark green flat expanded tufts, with slender appressed branches. Leaves 

 crowded, imbricated, in two ranks, broader and slightly falcate at points. 



Syn. — Plagiothecium denticulatum var. densum Sauter in Raben. Bryoth. no. 390 (i86i). 



Plagiothecium Schimperi Juratz. & Milde in ditto no. 588 (1861), Verhand. z. b. Ges. Wien 

 1862, p. 968. 



RhyHchostegium elegans var. terrestre Lindb. in Bot. Notis. 1865, p. 139, et in Not. ur Saells. 

 Fn. et Fl. fenn. ix, 38 (1867). 



Plagiothecium Schimperi a. genuinum Walth. & MoL. Laubm. Oberfr. 182 (1868). 



Hab. — Hard ground and tree-roots in subalpine woods. 



Var. y. uanum (Jurat.) Walth. & Mol. op. c. 183. 



Plants very small, in lax tufts ; branches erect, fasciculate, flagelliform, slender 

 and fragile. Leaves more pointed, erecto-patent, upper subsecund. 



Syn. — Plagiothecium nanum Jukatz. in Bot. Zeit. 1864, Beil. p. 16. Rabenh. in Hedwigia iv, 

 p. 31 (1865). 



Hab. — Among pebbles and under rocks. 



This moss is indeed worthy of its name, for few can compare with it for 

 its beautiful satiny lustre. Wilson's var. collinum appears to be a form with 

 subsecund leaves. I have added the two varieties from Limpricht's Laubmoose, 

 with the object of calling the attention of our collectors to them, as I have 

 not seen any British specimens. This variable moss has proved a source of 

 much confusion among botanists, as, following Spruce's lead, the European plant 

 was regarded as different from the American ; but by most recent bryologists they 

 are again united. The position of the capsule is of little moment, as it varies 

 with growth, and an erect one often becomes horizontal after the fall of the lid. 

 The nerves also vary in size and direction, and may be obsolete or reach to 

 the middle of the leaf, when it becomes Spruce's var. longinerve. 



5. ISOPTERYGIITM PITLCHEILTJM (JDicks) Lindb. 



Autoicous ; in dense glossy tufts, branches erect, fastigiate. Leaves 

 crowded, subpatent, secund, subfalcate, broadly lanceolate-acuminate, nerve- 

 less. Capsule suberect, cylindraceous ; lid conical obtuse. (T. CXVI, D.) 



Syn. — Hypnum pulchellum Dicks. PI. crypt, fasc. II, 13, t. 5, fig. 6 a et b (1790). Smith Fl. Brit, 

 1277 (1804). Turn. Muse. Hib. 136 (1804). Brid. Muse. rec. II, P. II, loi (1801), Sp. 

 Muse. II, 165 (1812), Mant. 169 (1819), Bry. univ. ii, 454 (1827). Gray Nat. arrang. i, 

 756(1821). Hook. Fl. Scot. P. 2, 143 (1821). Hueben. Muse. germ. 613 (1833). Berk. 

 Handb. 128 (1863). Boul. Muse. Fr. 90 (1884). Lesq. James Moss. N. Amer. 364 (1884). 



Leskea pulchella Hedw. Sp. muse. 220, t. 55, fig. 7—12 (1801). 



