2. Racomitrium albipiliferum C. Gao & T. Cao in C. Gao, G.-C. Zhang & T. Cao 长毛砂藓 chang-mao sha xian
Acta Bot. Yunnan. 3: 396. f. 5: 9–17. 1981. Type. China: Xizang, Ding-jie Co., K.-Y. Lang 1116 (holotype IFSBH; isotype PE).
Racomitrium capillifolium Frisvoll, Gunneria 59: 173. 1988. Synonymized by T. Cao & C. Gao 1992.
medium-sized to rather large, 2–5(–6) cm long, yellowish green above, dark brownish below, whitish color due to long hyaline hair-points, in loose tufts. Stems
creeping, sparsely and irregularly branched; central strand absent. Leaves
imbricately appressed when dry, erect-spreading when moist, narrowly lanceolate, 2.8–4.7 mm × 0.5–0.7 mm, clearly constricted at base, slightly keeled above, hyaline hair-points long, usually about 1–3 times longer than laminal length, smooth and not dentate, decurrent at base; margins distinctly recurved on one side, slightly recurved on the other side; costa percurrent, broader at base, gradually slender upward; upper and median leaf cells rectangular, 11–23 µm × 4–5 µm, strongly sinuosely thickened, smooth, unistratose at margins; basal cells elongate-rectangular, 20–46 µm × 4–5 µm, sinuosely thick-walled; alar cells not differentiated, with only one row of 20–30 hyaline marginal cells, quadrate to rectangular, thin-walled cells. Sporophytes not seen.