216 THE JOURNAL OF BOTANY 
suddenly narrowed to the rounded or toothed apex ; border narrow 
widened below as in S. acutifolium. Hyaline cells in the 
upper half of the leaf, rhomboid to elongate-rhomboid, generally 
septate, sometimes into 8-4 daughter-cells ; non-fibrillose or not 
rarely with a few very delicate fibrils, in the first case with longi- 
well as those of the apical half of the spreading branches, are 
narrow-ovate to lanceolate; at the base of the pendent branches 
they are broad-ovate. Hyaline cells of leaves from the basal half 
of the spreading branches have on the outer surface numerous 
pores ; these. are in the lower half of the leaf large, oval, a Ww 
almost asetislae and very numerous, and are surrounded ine a rela- 
tively broad, strongly thickened ring. In the leaves of the apical 
half of the spreading branches, and in all the leaves of the pendent 
branches, the pores decrease gradually i in size from the base to the 
the inner surface of all the leaves more numerous in the basal part 
and near the lateral margins, large, generally non-ringed, an 
frequently corresponding in position with the pores on the outer 
surface, so that complete perforation of the leaf results. 
Chlorophyliose cells in section trapezoid, more rarely triangular, 
and inserted between the hyaline cells on the inner surfac 
ie Hyaline cells more strongly convex on the outer surface of 
ioicous ; male branches clavate towards the apex, the a 
itself being elongate-subulate, light to dark red. Perigonial biota 
ovate, broader and shorter han the leaves of the sterile branches ; 
md aline cells in the basal half non-fibrillose and without pores, only 
arely with scattered, very delicate rudimentary fibrils; in the 
— half with very small narrowly ringed pores. Female flowers 
lose, and generally 1 -3 ina septate. Capsule relatively large, 
dark r - brown; spores dark yellow, finely papi illoge. Fruit 
very r 
This small, delicate, ~ very pretty Sphagnum is easily dis- 
—— from its nearest ally, S. rubellum (1) by the remarkably 
minute strongly ringed pores on the outer surface of the apical half 
of the leaves of the spreading branches; these pores are smaller 
than those of any other European species, and are especially con- 
spicuous owing to their being suddenly and not gradually replaced 
