Hypnace^] 184 \Acrocladium. 



6. PLAGIOTHECIUM STTCClFIENTrM ( WiU.) Lindb. 



Polygamous ; robust, deep yellowish-green, complanate. Leaves lax 

 divergent, long, ovate acuminate ; nerve forked, short ; cells chlorophyllose, 

 the primordial utricle not apparent Capsule cylindric. (T. CXVIII, B.) 



Sym. — Hypnum succuletitum Wils. MSS. 



Hypnunt denticulalum var. 7. succuknium WiLS. Bry. Brit. 407 (1855). 



Plagiolhedum succuUntum Lixdb. in Bot. Not. 1865, p. 143, et in Notis. saellsk. Fn. et Fl. 

 fenn. 29 (1867). LinpR. in Rabenh. D. kr. fl. Laubm, iii, 263 (1897). 



Plagiothecium sylvaficum vnr. succulentum HnsN. Muse Gall. 352 (1893). Dix. James. Stud. 

 Handb. 437 (1896). 



Polygamous, synoicous + male, or synoicous + female ; the bracts 

 broadly ovate, with acute recurved points. Tufts yellowish-green, glossy ; 

 stem creeping, stoloniferous, with erect lax-leaved branches. Leaves 

 spreading horizontally, slightly asymmetric, longish ovate, acutely pointed, 

 margin narrowly recurved in lower half; cells long, acutely pointed, the 

 primordial utricle not distinct, chlorophyllose. Perich. bracts erect, 

 sheathing, faintly nerved ; seta flexuose ; capsule cemuous, cylindric, 

 castaneous ; lid conical, bluntly rostellate ; peristome pale yellow, endostome 

 whitish, the processes slit between the joints. 



Hab. — Moist stony ground in woods ; rare. 



Win wick stone quarry, Warrington (IVilson). Todmorden (Nowell). Near Aber, N. Wales 

 {Dixon 1892) ! ! Near Over, Cheshire. 



23. ACROCLADIUM Mitt. 



Joum. Linn. Soc. xii, 531 (1869). 



Stem ascending, subpinnate, the bark of three layers of small purple 

 cells, with a cuticular layer of large hyaline cells. Leaves equal on all 

 sides or compressed and distichous, glossy, with two short nerves ; the 

 cells narrow, and at basal angles large, hyaline, and inflated. Capsule 

 hypnoid. Growing on the ground in wet places. — Der. uKpo^ the top, 

 and kXoSoi; a branch. 



A small genus of half a dozen species, of which the present is the only 

 one found in Europe. The structure of the stem is peculiar, and gives the 

 chief character to the genus, the section resembling that of a Sphagnum, e.g. 

 S. subsecundum. 



ACEOCLADIUM CTTSPIDATITM (Z.) Lindb. 



Dioicous ; stem suberect, pinnate, and with the branches cuspidate 

 by the closely imbricated leaves. Leaves ovate, obtuse ; perich. bracts 

 striated. Capsule curved, cernuous ; lid conical. (T. CXVIII, C.) 



