Sphagnum

Sphagnum teres (Schinip.) Angstr.; Hartin. Skand
I-l. ed. 8. 417. 1861.
Sphagnum squarrosum lerf% Schimj). Versuch Torfm. 64. 1858. Sphagnum squarroiulum I^sq. Mem. Calif. Acad. 1: 3. 1868.
Plants mostly rather slender, green or frequently more or less tinged with brown. Woodcylinder green to brown; cortical cells of the stem in 3-4 layers, large with thin walls, without fibrils or pores: stem-leaves very large, long-lingulate, slightly concave, weakly fimbriatelacerate at the apex, the border of narrow cells dissolved at the apex; hyaline cells in the apical portion of the leaf rhomboidal, 3-4 times as long as wide, toward the base much narrower, rarely divided in the basal portion, without fibrils, the membrane on the outer surface almost entirely resorbed, on the inner surface the membrane-gaps confined to the apical cells, those below showing generally longitudinal membrane-pleats: branches long and slender, in fascicles of 5, 2 or 3 spreading, their cortical cells in a single layer, the retort-cells with an inconspicuous neck : branch-leaves mostly imbricate, sometimes more or less squarrose, small, ovate-lanceolate, strongly involute toward the toothed apex; the border entire, of 2-3 rows of narrow cells; hyaline cells fibrillose throughout, rhomboidal, 3-8 times as long as wide, on the inner surface with numerous large pores, 3-6 per cell, on the outer surface similar; chlorophyl-cells triangular to trapezoidal in section, with broader or exclusive exposure on the outer surface, the lumen triangular; inner walls of hyaline cells where overlying chlorophyl-ceUs often strongly papillose; hyaline cells convex only on the inner surface, one fourth to one third of the diameter of the cell.
Dioicous. Antheridia in catkins; antheridial leaves often brownish, otherwise hardly differentiated from normal branch-leaves, except that the basal region shows cells with fibrilbands weakened or lacking. Fruiting branches erect, often elongate; perichaetial leaves longlingulate to spatulate, irregularly eroded at the apex, which shows a tendency to a hyaline border, the border otherivise lacking; both kinds of cells throughout; hyaUne cells without fibrils or divisions, the membrane on the outer surface mostly resorbed, on the inner surface with some gaps in the narrow cells of the sides and base, otherwise entire, with longitudinal or irregular membrane-pleats: capsule dark-brown: spores greenish-yellow, about 25 /i in diameter, finely granular-roughened.
Type locality: Sweden.
Distribution: Greenland; Labrador southward to New Jersey: New York; Michigan; Colorado; California northward to Alaska; also in Europe and reported from Asia.