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!Racomitrium albipiliferum C. Gao & T. Cao Search in The Plant ListSearch in NYBG Virtual HerbariumSearch in Muséum national d'Histoire naturelleSearch in Type Specimen Register of the U.S. National HerbariumSearch in Virtual Herbaria AustriaSearch in JSTOR Plant ScienceSearch in SEINetSearch in African Plants Database at Geneva Botanical Garden Decrease font Increase font Restore font
 

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)
Distribution:

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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