2a. Distichophyllum cirratum Ren. & Card. var. cirratum 卷叶黄藓原变种 juan-ye huang xian yuan bian-zhong
Rev. Bryol. 23: 104. 1896. Type. Indonesia: Java, Tjibodas, Massart 1397 (isotype FH).
Distichophyllum perundulatum Dix., J. Linn. Soc., Bot. 50: 106. 1935, fide Tan and Robinson (1990).
Plants small to medium-sized, mat-forming. Stems prostrate, 2–3(–6) cm tall, 2–5 mm wide with leaves when dry, irregularly branched, laxly foliate. Leaves strongly crisped, often twisted lengthwise when dry, variable in shape, ovate, oblong-elliptic to lingulate, 2.0–2.5 mm × 0.5–1.0 mm, the apices obtuse or with a stout mucro; leaf margins entire, often strongly undulate even when moist, borders strongly differentiated, consisting of 2–3(–4) rows of moderately thick-walled, linear cells and measuring 30–45 µm wide; costae strong, reaching near leaf apex, sometimes becoming continuous with the leaf mucro; laminal cells hexagonal to polygonal, moderately thick-walled, 18–22(–33) µm wide, with 3–4 rows of smaller submarginal cells, 11–18 µm wide. Sporophytes not seen in Chinese collections. Setae reportedly 7–8 mm long, smooth.