Mniace^. 



235 



[Mnium. 



Euhryum. The distinction from Bryum depends on the habit of the plants and 

 on the leaf-structure, the cells being very different from those of Byyum, 



Clavis to the Species. 



Leaves with a thickened limb. 

 Margin biserrate. 



Nerve vanishing below apex. 



reaching apex. 



Synoicous. 

 Dioicous. 



Leaf-cells in oblique rows. 

 not seriate. 



Leaves lax rufescent, with large cells, 

 dense green, with minute cells. 



- serrate with solitary teeth. 



Synoicous. 



Lid convex. 



rostrate. 



Dioicous. 



Leaves broadly ovate. 



Marginal teeth spinulose, of 3 cells. 

 ■ obtuse, of I cell. 



• ligulate. 



- entire. 



Synoicous, nerve vanishing. 

 Dioicous, nerved to apex, 

 not limbate. 



Leaves pointed, bluntly toothed by projecting cells. 

 obtuse, entire. 



*Limb doubly serrate. 



honium. 



marginatum. 



spinosum. 



riparium. 

 orthorrhynchum. 



silvaticum. 

 rosiratnm. 



cuspidatum. 



Seligeri. 



nndnlafum. 



pseiidopunctatum, 

 pnnctattim. 



stellare. 

 cinclldioides. 



I. MNIUM SPINOSUM {Voit) Schwaeg. 



Dioicous ; in loose blackish-green tufts. Lowest leaves minute, 

 squamiform, upper large, obovate cuspidate, the cells in oblique rows. 

 Caps, oval-oblong, lid conic rostellate. (T. LXXXI, A.) 



Syn. — Bryum spinosum Voir in Sturm Deutsch. fl. II, 11 {1810). Brid. Mant. 119 (i8ig). 



Mnium rostratum /3. spinosum Roehl. Deutsch. fl. iii, g6 (1813). 



Mnium spinosum Schwaeg. Suppl. I, p. It, 130, t. 78 (1816). Beid. Sp. muse. Ill, 48 

 (1817). Hartm. Skand. fl. Hueben. Muse. germ. 410 (1833). Br. Sch. Bry. eur. 

 fasc. s, p. 26, t. 6 (1836). C. MuELL. Synops. i, 162 (1849). Schimp. Synops. 394 

 (i860), 2 ed. 486, LiNDE. in Not. Sael. Fn. et Fl. fenn. ix, 45 (1867). De Not. 

 Epilogo 363 (i86g). Milde Bry. siles. 228 (1869). Hobk. Synops. 122 (1873). Juratz. 

 Laubm. oester.-ung. 305 (1882). Boulay Muse. fr. 233 (1884). Lesq. James Moss. 

 N. Amer. 246 (1884). HusN. Muse. gall. 256, t. 70 (1889). Limpr. in Rabenh. D. kr. 

 fl. Laubm. ii, 465 (1893). 



Mnium (Palla) spinosa Brid. Bry. univ. i, 711 p.p. (1826). 



Mnium melanostomum Brid. MSS. 



Astrophyllum spinosum Lindb. Muse, scand. 14 (1879). 



Dioicous ; robust, in very loose dingy or black-green tufts. Stems 

 radiculose at base, blackish, often with 2 — 3 branches, dense-leaved 

 subarcuate and flagelliform. Lowest leaves minute, squamiform, 



