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Published In: Gunneria 59: 197. 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 joseph-hookeri Frisvoll (Figs. 11–17.)
Map: Racomitrium joseph-hookeri Frisvoll (Distribution in China)

Distribution     (Last Modified On 5/4/2009)
Habitat: on rocks in alpine mountains; alt. 3400–3800 m.
Distribution: China, Japan, Bhutan, and Nepal.

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


Chinese specimens examined: Sichuan: Tian-quan Co., Mt. Erlang, C. Gao et al. 17777 (IFSBH). Xizang: Bo-mi Co., Y.-G. Su 918 (HKAS). Yunnan: Bi-jiang Co., M. Zang 5171 (HKAS, IFSBH); Mt. Gaoligongshan, M. Zang 5880 (HKAS).

Notes     (Last Modified On 5/4/2009)
general taxon notes:
Racomitrium joseph-hookeri is mostly characterized by its obscure, bulging leaf cells (pseudopapillose) and bistratose upper leaf margins. Leaf cells are generally elongate-rectangular and alar cells are not differentiated. The length of hyaline hair-points is variable in this species.


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15. Racomitrium joseph-hookeri Frisvoll   霍氏砂藓   huo-shi sha xian
Gunneria 59: 197. 1988. Type. Sikkim: J. D. Hooker 322.
Plants medium-sized, up to 3.5–4.0 cm long, yellowish green above, dark brown or blackish below, in loose tufts. Stems creeping or ascending, irregularly or subpinnately branched; central strand absent. Leaves imbricately appressed when dry, erect-spreading when moist, narrowly ovate-lanceolate to lanceolate, keeled above, 2.4–2.9 mm long, hyaline hair-points smooth, not dentate, somewhat flexuous, short to long; margins recurved on both sides, up to 1/2 the leaf length on one side, shortly recurved on the other side; costa thick at base, percurrent; upper leaf cells bistratose at margins, rectangular to elongate-rectangular, 11–35 µm × 5–9 µm, sinuosely thick-walled, with pseudopappillae (bulging cell walls), obscure; median cells similar to the upper cells; basal cells rectangular to elongate-rectangular, 30–50 µm × 8–9 µm, sinuosely thick-walled, bulging; alar cells not differentiated, consisting of only a row of 4–7, rounded rectangular cells, with straight and somewhat thick walls. Sporophytes not seen.
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