SPHAGNEI. 305 



118. ARCHIDIUM, Bridel. 



Sporangium globose, sessile on the short tumid vaginula, 

 without any lid ; coiumella fugacious ; spores very large, few 

 in number ; veil irregular, torn in the middle. 



1. A. phascoides, Brid.Hook. fy Wils. t. v. ; Eng. Bot. 

 t. 2107. ; (Plate 24, fig. 10) ; Moug. $ Nest. n. 904. 



In heaths and fields. Bearing fruit in spring. 



Monoicous. Stem at first short, sending off innovations 

 for one or two years from the base of the female flowers ; 

 sterile shoots flagelliform with scattered, minute, shorter 

 leaves ; fertile stem stouter ; leaves lanceolate, entire ; nerve 

 ceasing below the minutely toothed tip; perichaetial leaves 

 larger, toothed above ; spores from eight to sixteen in each 

 sporangium, subgloboso-tetrahedric, with one convex and three 

 or four flat sides ; veil membranous ; leaf-cells lax, subhexa- 

 gonal, elongated, nearly uniform. 



FAMILY III. SYNCLADEI. 



Branches fasciculate ; fruit cladocarpous. 



OBDER XXXIII. SPHAGNEI, Mont. 



119. SPHAGNUM, Dill 



Sporangium globose ; receptacle elongated, fleshy ; peri- 

 stome none ; veil ruptured near the middle ; leaf-cells of two 

 kinds, the one large, containing a spiral thread, the walls 

 perforated between the spirals ; the other linear, surrounding 

 the first ; prothallus scale-like. 



* Leaves obtuse. 

 1 . S. cymbifolium, Ehr. ; stem robust, mostly bipartite ; 



