472 THE JOURNAL OF BOTANY 
(Wilson); Calder Valley, W. Lanes. (Wilson); Artro Valley, Meri- 
onethshire (Jones & Horrell); Islay (Ley); Keston Common, t 
(Horrell); Burnham Common, Bucks (Sherrin); Owston Ferry, 
N. Lincolnshire (Smith); Tilgate Forest, Sussex (Horrell); Goath- 
land, N.E. Yorks. (Horrell). 
2) Var. purpurascens Warnst. in Hedwigia, 1884, No. 7-8. 
In the upper part, and especially in the capitulum, a beautiful 
purple-red, paler below. 
(18) Var. versicolor Warnst. Eur. Torfm. No. 7, 1888. Colour 
in the upper part pale reddish-violet, in the middle whitish, towards 
the base brownish. 
Rhinog Fawr, Merionethshire (Jones ¢ Horrell); Tilgate Forest, 
Sussex (Horrell) ; Sea Scales, Cumberland (Ley); Holt, E. Norfolk 
(Burrell). 
48, 9. cenrrate Jensen, Bihang Till K. Svenska Akad. Handl. 
Bd. xxi. Afd. iii. No. 10, 1896. 
yn. 8S. palustre Li. subsp. intermedium Russ. Zur Anat. der 
Torfm. 1887, 28. . papillosum Warnst. var. intermedium (Russ.) 
Warnst. in Hedwigia, 1891, 159. 8. intermedium Russ. in Archiv 
Naturk. Liv-, Est-, & Kurlands, ser. ii. Bd. x. Lief 4, 468, 1894. 
Plants generally robust to very robust, 7-20 and also 30-40 cm. 
high, forming looser or denser tufts; light green, grey, grey-green, 
greenish-yellow, pale yellow, yellow to brown, brownish-green or 
dark brown; rarely submerged. 
e 
g 
smaller than the inner, with numerous fibrils and 1-2 or a times 
8-7 large round pores, sometimes almost without fibrils, and with 
only a single pore. 
Fascicles of 3-5 branches, of which 2-8 are spreading ; leaves 
loosely or closely arranged; branches meso- and macro-cladous, 
rarely brachycladous; eurycladous or more frequently dasycladous 
very dense and compact; homalo pano-, or ano-cladous, 
rarely katacladous. Cortical cells of branches strongly fibrillose 
and porose. 
Branch-leaves large to very large, very concave, resembling those 
of S. cymbifolium. On the inner surface with numerous pores near 
the margins only, or not rarely in the middle and especially in the 
upper part of the leaf with 1-6, generally 1-2 large round pores on 
each cell; on the outer surface generally with numerous pores along 
Chlorophyllose ceils in section triangular-oval, rectangular-trape- 
zoid, barrel-shaped, elliptical to narrow-elliptical or spindle-shaped ; 
_ outer wall always more or less strongly thickened ; lumen always 
rounded, triangular-elliptical, elliptical, or oval, hypocentric or 
almost centric, sometimes also excentric. 
Stem-leaves lingulate-spatulate, generally almost as large as the 
branch-leaves, but not rarely much smaller ; two-thirds as Ain 
delicate fibrils, sometimes with numerous fibrils; pores sometimes 
numerous ; hyaline cells only very rarely here and there septate. 
