Cow Horn Bog Moss

Plants rather stout, whitish green tinged with brownish color, in dense tufts. Stem cortex in 1 layer, hyaline cells without fibrils; central cylinder thick, yellowish brown. Stem leaves 0.8–1.2 mm × 0.5–0.8 mm, triangular-ligulate, rounded at the apex; borders narrow above, slightly widened below the middle; hyaline cells divided, densely fibrillose, sometimes the basal cells smooth, with large, ringed pores at the corners on the ventral surface, with numerous pores in commissural rows on the dorsal surface. Branches in fascicles of 3–5, with 2 spreading, blunt at the apex. Branch leaves 1.1–1.6 mm × 0.5–0.9 mm, broadly oblong-ovate to ovate-lanceolate, strongly concave, margins involute, borders narrowly differentiated, slightly secund and dentate at the apex; hyaline cells densely fibrillose, with large pores along commissural rows on the dorsal surface, few to no pores on the ventral surface; green cells in cross section elliptic, centrally located. Dioicous. Sporophytes not seen.

Distribution: China, Europe, North America, and northern Africa.

Habitat: in bogs.

Sphagnum auriculatum Schimp., Mém. Acad. Sci. Sav. Inst. Fr. 15: 80. 1857. Sphagnum subsecundum Nees ex Sturm var. auriculatum (Schimp.) Schlieph., Verh. Zool. Bot. Ges. Wien 15: 411. 1865. Sphagnum subsecundum var. gravetii (Russ.) C. Jens., Bot. Faeroes Dan. Invest. 139. 1901. Sphagnum subsecundum var. gravetii (Russ.) C. Jens. f. hypisopora Russ. ex Broth. in Handel-Mazzetti, Symb. Sin. 4: 8. 1929. Sphagnum subsecundum var. rufescens (Nees & Hornsch.) Hüb., Muscol. Germ. 26. 1833. Sphagnum subsecundum var. yunnanense C. Jens. ex Broth. in Handel-Mazzetti, Symb. Sin. 4: 8. 1929. Type. China: Yunnan, Wei-xi Co., Handel-Mazzetti 8493 (holotype H; isotype KUN).

Sphagnum denticulatum is a species of moss belonging to the family Sphagnaceae. It is widely distributed in Europe but it is also found in other parts of the world.

In a study of the effect of the herbicide Asulam on moss growth, Sphagnum denticulatum was shown to be the third most sensitive to the herbicide out of the 18 species tested. The study concluded that it was sensitive to Asulam exposure.