Plants: moderate-sized, soft, loosely tufted, slender, capitulum flat-topped to rounded; pale, dirty green, yellowish to brownish; without metallic lustre when dry. Stems: brown to reddish brown; superficial cortical cells usually aporose, but some have a single round to elliptical pore in the distal portion of the cell free from the cell wall. Stem: leaves triangular-lingulate, 1.2–1.6 mm, broadly apex acute to narrowly truncate and toothed, border narrow or indistinct at base (less than 0.25 the width); hyaline cells rhomboid, mostly 0–1-septate; convex surface with membrane pleats, concave surface with 1–3 rounded membrane gaps occupying most of cell. Branches: somewhat 5-ranked. Branch: fascicles with 2 spreading and 1–2 pendent branches. Branch: leaves ovate-lanceolate, 1.3–2 mm, strongly concave, apex strongly involute; margins entire to somewhat toothed near apex, hyaline cells on convex surface with numerous ringed elliptic pores (6–10) along commissures, concave surface mostly aporose except near margins; Sexual condition dioicous or monoicous. Spores: 21–23 µm; minutely papillose.
Shady, seepy cliffs. low elevations. B.C., e Asia.
Sphagnum junghuhnianum in the flora area is known only from the Queen Charlotte Islands. Sporophytes of Sphagnum junghuhnianum were not seen. Three other large, brown species of sect. Acutifolia have stem leaves without fimbriate to lacerate apices, S. subnitens (forms without red color), S. subfulvum, and S. flavicomans. Sphagnum flavicomans has a more pointed stem leaf and a darker brown color as well as a strongly different ecology and range. Both S. subnitens and S. subfulvum have a glossy sheen when dry that is lacking in S. junghuhnianum. Sexual condition and spore characters were taken from H. A. Crum (1984).