97 
have since found on Scolty, and at Potarch, Powlair, and Dal- 
breck. Fertile plants of S. rigidum, Dr. Braithwaite tells me, 
had not been found since 1832, but I have found it in fruit on 
Dalfro every year for the last 5 or 6 years, and also at Powlair 
last year ; the tall squarrose form, so far as I know, occurs here 
only on Scolty. S. tenue I have met with only at Logie-Cold- 
stone ; S. luridum and S. letevirens, Brthw., on Clachnaben. S. 
populosum and S. Austini are, I believe, neither of them very 
scarce, but as I am not very familiar with them, I can at present 
only mention as localities—for the former Dalfro and Inverey, 
and for the latter Glen Dye. Most of the remaining Sphagna 
are so common as not to require notice of special localities. 
In the following synopsis S.L signifies stem-leaves and B.]. 
branch-leaves. 
SYNOPSIS OF BRITISH SPHAGNA. 
Section I. Fnrerrara, stem leaf, obtuse and fimbriated. 
A. Cympirouia. S. 1. large, fimbriated all round margin, with fibres in the 
cells. B. 1. large hooded, sometimes fimbriated, cells prickly to- 
wards the apex, and cortical cells with spiral fibres. 
(1) S. Austini, Sull, Fibres in basal cells of stem leaves. 
(2) — papilloswm Lindb. 
(3) — cymbifolium Ehrh., Fibres in apical cells of stem leaves. 
B. Squarrosa. §. 1. slightly bordered below, fimbriated at the rounded 
apex, without fibres. B. 1. generally squarrose above the middle 
and much contracted, composed of small cells ; cortical cells with- 
out fibres, and often without pores. 
(4) S. squarrosum Persoon, plant large. 
(5) — squarrulosum, plant small. 
(6) — teres, Angstrom, soft, often not squarrose. 
(7) — subteres. 
(8) — Lindbergii, Schimper, cells small as in Sect. II. G. S. 1. some- 
times acute and hooded, but generally flattened and fimbriated. 
_ C. Impricata. S. 1. much bordered, fimbriated at apex (No. 8 might be 
united to this group). 
(9) S. strictum Lindb., dioecious, S. 1. fimbriated only at rounded apex. 
(10) — jfimbriata, Wilson, monoecious, S. 1. much broader at apex, and 
sometimes fimbriated slightly above the margin. 
Section II. Acura. S. 1. acute or acuminate, and toothed. 
D. Mota. S. 1. fibres throughout the cells, leaves broad in the middle 
tapering towards both ends, apex toothed. 
a. B. 1. like 8. 1, or slightly narrower. 
(11) S. molle, Sull., czespitose, plant fine. 
(12) — arctum, Brthw., plants very dense. 
b (13) — Angstromii, Martin, B. 1. obtuse and concave. 
