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Published In: Acta Botanica Yunnanica 3: 396. f. 5: 9–17. 1981. (Acta Bot. Yunnan.) Name publication detail

Project Name Data (Last Modified On 3/16/2009)
Acceptance : Accepted
Project Data     (Last Modified On 5/4/2009)
General Reference:

Illustration & Map     (Last Modified On 5/4/2009)
Illustrations: Racomitrium albipiliferum C. Gao & T. Cao (Figs. 11–15.)
Map: Racomitrium albipiliferum C. Gao & T. Cao (Distribution in China)

Distribution     (Last Modified On 5/4/2009)

Habitat: on rocks or boulders; alt. 3000–4700 m.

Distribution: China, Bhutan, and Nepal.


Specimens Examined     (Last Modified On 5/4/2009)
Specimens Examined:

Chinese specimens examined: Sichuan: Mu-li Co., L.-S. Wang 83-11255 (HKAS). Xizang: Xing-kai, Y.-G. Su 947 (HKAS); Ya-dong Co., M. Zang 331 (HKAS).


Notes     (Last Modified On 5/4/2009)
general taxon notes:

Racomitrium albipiliferum is characterized by its whitish habit with loosely tufted plants and extensively long, hyaline hair-pointed leaves. The leaves are constricted at leaf bases, and the leaf cells are nearly uniform, elongate-rectangular. The alar region is not differentiated, with only a row of 20–30 rectangular, hyaline, thin-walled cells. It sometimes lookslike R. subsecundum (Hook. & Grev.) Mitt., when the hyaline hair-points are only as long as the laminal length; however, it differs from R. subsecundum by its straight leaves and undifferentiated alar region. In contrast, Racomitrium subsecundum has secund leaves and a clearly differentiated alar region.


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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.
Plants 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.


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