EUROPE AND NORTH AMERICA. 35 



Synon. — Sph. imbricatum, Hornsch. Mss. Russ. Torfm. p. 21 (1865). 



Sph. cymbifolium var. /3. condensatum, C. MOll. Synops. i. p. 92, p.p. (1848). 



Sph. Austini var. /?. imbricatum, Lindb. in Act. Soc. Sc. Fenn. x. p. 280, in 

 addend. (1872), Bot. Not. 1873, p. 45, et Not. ur Sallsk. pro Fn. et Fl. Fenn. Forh. 

 xiii. p. 392 (1874). Braithw. Sphag. Brit. Exsic. n. 2 (1877). 



Hab. — Island of Lewis, Western Hebrides (Dr. Moore, 1868); Witherslack 

 Moss, Westmoreland (Barnes, 1875). Forming very dense tumid hassocks. 



This variety was first found in Kamtschatka by Redowski, 

 and fertile specimens quite resembling the Hebridean plant were 

 collected in Chiloe by Captain King. 



It is worthy of note that the climate of Lewis appears closely 

 to resemble that of some of the Antarctic islands, and I observed 

 in the grounds of the castle that the beautiful Escallonia macrantha 

 formed immense bushes, which bloomed profusely. The bare 

 moorlands which compose almost the entire island, are dotted over 

 with innumerable great cushions of Rhacomitrium lanuginosum 

 more hoary than usual, and with these between Stornoway and 

 Garynahine occur the great tussocks of our Sphagnum, so large, 

 indeed, that they attracted the attention of Dr. Moore while 

 driving along the road, and not more than three of these have yet 

 been met with. The stems of the moss are much intermixed with 

 very fine, branched, brown radicles, and in the plant from Wither- 

 slack is a large admixture of Odontoschisma sphagni, the filiform 

 radicles of which are interwoven with the stems of the Sphagnum. 



3. Sphagnum papillosum, Lindberg. 



Pl. IV. 



Dioicous ; more or less ochraceous, the stem with four layers 

 of cuticular cells. Stem leaves spathulate, rounded and minutely 

 fringed at apex. Branch leaves closely imbricated, cymbiform- 

 concave, cucullate at apex, rounded ovate, broad, their chlorophyl- 

 lose cells central, enclosed by the hyaline, and densely and 

 minutely papillose where united to them. Perichaetial bracts 

 oblong, plicate, their cells of two forms ; in the lower half the 

 central part consists of narrow, empty, parenchymatous cells, the 

 margins and upper half of porose and fibrose cells. 



Synon. — Sph. papillosum, Lindb. in Act. Soc. Sc. Fenn. x. p. 280, in addend. 

 (1872), in Bot. Not. 1873, p. 45, et in Not. Sallsk. pro Fn. et Fl. Fenn. Forh. 1874, 

 p. 392. Braithw. in Monthl. Micr. Journ. May 1873, p. 214, pl. 16, et Sphag. Brit. 

 Exsic. n. 3, 4, et 8 b (1877). 



Sph. obtusifolium, Aucr. p. p. 



D 2 



