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(9) 華南長筒蕨
Selenodesmium siamense (Christ) Ching & Chu H. Wang
膜蕨科 (Hymenophyllaceae)
英文名 (English name): Siamense Selenodesmium
Status in China: Least Concern (LC)
Description: Perennial herbs. Rhizome short, creeping to erect, glabrous, with many stout roots. Leaves tufted; stipes 3-10 cm long, glabrous, narrowly winged near apex; lamina oblong-ovate to triangular, generally 10-12 cm long, bi- or tripinnate; pinnae 3-5 pairs, oblong-ovate, sessile; rachis narrowly winged; pinnules pinnately dissected, segments linear. Sori borne on the basal segments of the pinnules, indusium cylindrical, mouth hardly dilated and lobed; receptacle protruding, curved, dark brown.
Distribution: Hong Kong Island, Tai Mo Shan, Tai Po Kau, Sham Chung. Hainan, Guangdong, Guangxi; Vietnam and Thailand.
Habitat and Ecology: In valleys, especially on wet places with dripping water.
It is a rare species of value in scientific research. In Hong Kong, some localities of its occurrence are in Country Parks under protection.
References:
秦仁昌， 1959: 中國植物誌 2: 191，圖版 15：6-7。科學出版社，北京。
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