2. Lyellia platycarpa Card. & Thér. 宽果异蒴藓 kuan guo yi shuo xian
Arch. Bot. Bull. Mens. 1: 67. f. 2. 1927. Type: China. Yunnan.
Lyellia minor W.-X. Xu & R.-L. Xiong, Acta Bot. Yunnan. 6: 181. f. 6. 1984. Type: China. Xizang, Lin-zhi (Nyingchi) Co., Xejilha Shan, alt. 4600 m, P.-C. Chen 356 (holotype YUKU).
Plants medium-sized, usually 2–5 cm high. Stems erect, with scale-like leaves at base, more leaves near the apex. Leaves slightly crisped when dry, erect-patent when moist, lanceolate, suddenly narrowed from a broadly sheathing base; ventral lamellae usually in 20–25 rows, 3–5 cells high; median cells rounded oval, 9–14 µm wide, thick-walled, mostly bistratose; cells at sheathing base unistratose, narrowly rectangular, mostly 15–30 µm × 5–9 µm, hyaline, thin-walled; margins single-or double-toothed, teeth minute; costa broad, reaching to the apex, grossly dentate on the back above. Dioicous. Perichaetial leaves 1.0–1.5 cm long. Setae 2.0–2.5 cm long; capsules oblate-globose, with lateral arching keels, symmetrical, curved; stomata at the base of urns, surrounded by small cells. Spores spherical, 10–17 µm in diameter, verrucose.