On Bog Mosses. 57 



D. Cuspidata. 



9. S. squarrosum Pers, — 10. 8. teres Angst. — 11. S. 

 acutifolium Ehrh. — 12. S. stridum Lindb. — 13. S. 

 jimhriatum Wils. — 14. 8. Lindhergii Sclipr. — 15. 

 8. WuJjianum Girgcnsohn. — 16. 8. intermedium 

 Hoff. — 17. 8. cusjpidatum Ehrh. 



Of these ;S^. Angstromii and 8. Wuljianum have not yet been 

 detected in Britain. 



Group A. CymbifoHa. — Plants robust, laxly tufted, sometimes 

 intermixed with other species. Branches turgid, those of the 

 coma obtuse ; branch leaves imbricated, very broad, ovate, rounded 

 and cucuUate at apex, boat-shaped, concave, scarcely margined. 

 Dioicous. 



1 Sph. cymbifohum Ehrhart. 



Hannoverisches Magazin (1780) p. 235. 



Plate IX. 



Syn. — Sphagnum mollc deflexum, sqnamis cymbifonnibus, Dillen. Hist. Muse 

 p. 240, Tab. XXXII, fig. 1 (17il).— Sph. paksti-e a. Lin. Sp. PI. II, p. 1106 

 (1753). Lindberg Eevis. Crit. Ic. Fl. Dan. p. 8 (I87i).— Sph. cymhifoUum Ehrh. 

 1. c, Hedw. Fund. Muse. II, p. 85, Tab. I, fig. 1 (1782). N. Hsch. & St. Bryol. 

 Germ. I, p. 6, Tab. I (1823). Brid. Bryol. univ. I, p. 2 (1826). C. Miill. Syn. 

 Muse. I, p. 91 (1849). Wils. Bryol. Brit. p. 17, Tab. IV (1855). Schpr. Toifm. 

 p. 69, Tab. XIX (1858). Syn. Muse. Eur. p. 684 (1860). Lindb. Torfmos. No. 14 

 (1862).— 5'pA. latifolium Had. Sp. Muse. p. 27 (1801). Turner Muse. Hibern. p. 5 

 (1804). Schwiigr. Supp. I, P. I, p. 12 (1811). Eng. Bot. T. 1405,— -S^sA. obtusi- 

 folium Ehrh. Crypt, exsic. p. 241. Hofi". Deutseh. Fl. II, p. 21 (1795). Web. & 

 Mohr, Bot. Taschen. p. 72 (1807). Hook. & Tayl. Muse. Brit. p. 3, Tab. IV 

 (1818). 



Dioicous. Plants robust, 6-12 inches long, often bipartite, 

 laxly or densely tufted : pale or dirty olivaceous green, sometimes 

 variegated with purple or brownish yellow, pale beneath. Stem 

 sohd, woody, tawny brown, sometimes green, covered with a very 

 spongy cortical web forming 3-4 strata, the cells of which are 

 fibrose and porose. Eamuli 4-5, of which 2-3 are divergent, 

 arcuate, turgid, acute at apex, the others pendulous and appressed 

 to stem, their cortical cells spiriferous, and part of them perforated 

 at apex. Cauline leaves lingulate-spathulate, slightly frayed at the 

 rounded apex ; very soft, longitudinally sulcate, very laxly areolate, 

 usually without fibres or pores. 



Eamuline leaves densely imbricated, broadly ovate, deeply con- 

 cave with the margins incurved above, extreme apex cucullate and 

 squamulose at the hack by prolongation of the inferior margin of 

 the large pores ; hyaline cells dilated, rhombic, with annular and 

 spiral fibres, pores large, not numerous; chlorophyl cells com- 

 pressed, entirely enclosed by the hyaline. Male plant like the 



