NECKERACEiE.] 21/ {Leucodon. 



8. LEUCODON Schwaeg. 



Suppl. I, P. II, p. I (1816). 



Laxly tufted mosses growing on rocks or the bark of trees. Main 

 stem creeping, radiculose, secondary erect or ascending, julaceous, incurved, 

 nearly simple, often with descending stolons near the base. Leaves 

 densely imbricated in many rows, nerveless, with many longitudinal plaits, 

 entire, appressed when dry, divergent when moist ; the cells incrassate, at 

 margin of lower part roundish quadrate, in the middle and apex elongated. 

 Perichaetial bracts sheathing erect ; capsule regular, immersed or exserted, 

 calyptra cucullate, reaching below the capsule and clasping the seta, lid 

 conical ; teeth of peristome 16, lanceolate, papillose, split along the middle, 

 endostome a narrow membrane or none. — Der. Xeii/co?, white ; otov^, a 

 tooth. 



Paris enumerates 46 species of this genus, which is remarkable in that the 

 two strata "of the peristome teeth are separated, and divided into chambers by 

 transverse partitions. 



LEUCODON SCIUROIDES {L.) Schwaeg. 



Dioicous ; in lax dingy green tufts. Leaves imbricated, ovato- 

 acuminate subsecund, plicato-striate. Capsule elliptic-oblong, lid conic 

 rostellate ; teeth of peristome cleft in the middle. (T. CXXIV, B.) 



?rm.-^Muscus Urrestris major nigricans, arborum truncis adnascens Ray Synops. 2 ed. 39 (1696). 

 Muscus repens serici wiodo lucens, viliculis longioribus erectis op. cit. app. 338. 



Hypnum trichoides erectum, ramulis recurvis, obscuri coloris Dill, in Ray Synops. 3 ed. 



83 (1724)- 

 Hypnum arboreum sciuroides Dill. Hist. muse. 319, t. 41, f. 54 (1741), et Herbar. 



Hypnum sciuroides L. Sp. pi. 1130 (I7S3). HuDS. Fl. Angl. 429 (1762). Weiss Crypt. 



goet. 258 (1770). Neck. Meth. muse. 175 (1771). Wither. Bot. arrang. ii, 689 (1776). 



LiGHTF. Fl. Scot, ii, 764 (1777). Relh. Fl. Cant. 417 (1785). Hoffm. Deuteh. fl. ii, 



67 (I79S)- 

 Fuscina sciuroides Schrank Balers, fl. ii, 452 (1789). Roehl. Deutseh. fl. iii, 64 (1813). 



Fissidens sciuroides Hedw. Fund. II, 91, t. 8 (1782), Sp. muse. 161 (1801). Roth Fl. germ, 

 i, 460 (1788). Brid. Muse. rec. II, P. I, 153 (1798). Roehl. Moosg. D. 311 (1800). 

 ScHULTZ Fl. Starg. 293 (1806). Wahlenb. Fl. Lapp, 335 (1812), Fl. Carpat. 342 (1814). 



Dicranum sciuroides Sibth. Fl. Oxon. 280 (l794). Swartz Muse. Suec. 32 (1799). Sm. 

 Fl. Brit. 1215 (1804), Eng. Bot. t. 1903. 



Pterogonium sciuroides Turn. Muse. hib. 32 (1804). 



Cecalyphum sciuroides P. Beauv. Prodr. 51 (1805), Mem. Soc. Linn. Par. i, 442 (1822). 



Pterigvnandrum sciuroides Brid. Sp. Muse. I, 134 (1806). 



Trichostomum sciuroides Web. Mohr Bot. Tasch. 132 (1807). 



Leucodon sciuroides Schwaeg. Suppl. I, P. II, p. I (1816) et II, P. I, 82, t. 125 (1823). 

 Hook Tayl. Muse. Brit. 63, t. 20 (1818). Brid. Mant. 134 (1819), Bry. univ. ii, 208 

 (1827). Gray Nat. arrang. i, 741 (1821). Hueben. Muse. germ. S49 (1833). De Not. 



