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Published In: Gunneria 59: 159. 1988. (Gunneria) 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 verrucosum Frisvoll (Figs. 12–20.)
Map: Racomitrium verrucosum Frisvoll (Distribution in China)

Distribution     (Last Modified On 5/4/2009)
Distribution:
Habitat: on rocks.
Distribution: China, Bhutan, Sikkim, Nepal, and India.
 

Specimens Examined     (Last Modified On 5/4/2009)
Specimens Examined:
Chinese specimens examined: Xizang: Ya-dong Co., M. Zang 441 (HKAS, IFSBH), Xizang Team 7890 (HKAS, IFSBH).
 

Notes     (Last Modified On 5/4/2009)
general taxon notes:
Racomitrium verrucosum is characterized by usually small, densely compacted plants, recurved leaf margins nearly throughout the leaf length, bistratose upper leaf cells that are obscure and densely papillose, and by thick, percurrent to shortly excurrent costa.

 

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22. Racomitrium verrucosum Frisvoll   粗疣砂藓   cu-you sha xian
Gunneria 59: 159. 1988. Type. Nepal: Between Thang La pass and Thudam, alt. 4550 m, Iwatsuki 1459.
 
Plants small to medium-sized, up to 3–4 cm long, yellowish green above, brownish or blackish brown below, in dense cushions. Stems irregularly branched; central strand absent. Leaves imbricately appressed when dry, erect-spreading when moist, ovate-lanceolate, 1.3–1.8 mm × 0.35–0.50 mm, without or with short, smooth, not dentate hyaline hair-points; margins recurved nearly throughout on both sides, upper margins bistratose; costa thick, percurrent or shortly excurrent; upper leaf cells subquadrate to short-rectangular, 6–12 µm × 5–10 µm, mostly bistratose, densely papillose, obscure, somewhat sinuosely thick-walled; median cells short-rectangular, 7–15 µm × ca. 9 µm; basal cells narrowly rectangular, 25–50 µm × ca. 9 µm, strongly sinuosely thick-walled, porose; alar cells not differentiated, consisting of only a row of 16–25 hyaline, straight-walled cells. Perichaetial leaves shortly ovate-lanceolate, obscure, acuminate, without hyaline hair-points. Setae erect, ca. 4.5 mm long; capsules ovoid, erect, ca. 1.3 mm long; peristome teeth lanceolate, divided to the base. Spores spherical, 12–16 µm in diameter.
 
 
 
 
 
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