1. Symphyodon echinatus (Mitt.) Jaeg. 异叶刺果藓 yi-ye ci-guo xian
Ber. Thätigk. St. Gallischen Naturwiss. Ges. 1876–77: 296. 1878. Stereodon echinatus Mitt., J. Proc. Linn. Soc., Bot., Suppl. 1: 110. 1859. Type. India: Sikkim, Hooker 734 (holotype NY; isotypes BM, S, W).
Plants medium-sized, to 3 cm long, yellowish green to brownish green, not glossy. Stems with somewhat dendroid shoots bearing many bipinnate to tripinnate branchlets. Leaves appressed, clearly dimorphic; stem leaves ovate-lanceolate, 1.3–1.4 mm × 0.5–0.6 mm, symmetric, gradually tapered, narrowly acuminate at the apex; margins irregularly serrate above, serrulate or subentire below, often clearly decurrent at the base; branch leaves 0.7–0.9 mm × 0.30–0.40 mm wide, slightly incurved on one side or on both sides, oval, broadly ovate to oblong-ovate, cordate or oblong-lanceolate; all leaf apices broadly to moderately broad acute; margins irregularly serrate in the upper 2/3, serration formed by a row of enlarged cells, subentire below; costae unequal, extending to 2/5–1/2 total leaf length; apical leaf cells not particularly shorter than the adjacent cells; median cells linear, 30–40 µm × 2.5–3.5 µm, strongly prorate at the upper ends, especially in branch leaves; alar cells differentiated, quadrate to rectangular, thick-walled, of 2–4 rows extending 2–4 cells up the margins. Perichaetial leaves sheathing at the base, abruptly narrowed to a long acumen, cells thick-walled, porose, costae very short, double. Sporophytes not seen.