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    台灣植物誌 第二版  Flora of Taiwan, 2nd edition    Vol. 1

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    台灣植物誌第二版  Flora of Taiwan, 2nd edition  1: 186

     17. DAVALLIACEAE 骨碎補科
    SHIEH, WANG-CHUENG, DEVOL, CHARLES E. and YANG, TAI-YING

    Mostly epiphytes with long creeping scaly rhizomes. Stipes articulate to rhizome; fronds usually broadly deltoid and often finely dissected, but sometimes simple, venation free. Sori submarginal, terminal on veinlets; indusia tubula, scale-like, or linear and continuous, opening towards margin.
    A family of eight genera, four in Taiwam.

    KEY TO GENERA
    1. Terrestrial; rhizomes with both scales and hairs; fronds deltoid, thin, tripinnate; sori large… 4. Leucostegia
    1. Growing on tree trunks, old logs, or moss covered rocks; rhizomes covered with broad scales, without hairs.
    2. Texture thin; fronds large, finely dissected… 1 Araiostegia
    2. Texture coriaceous; scales usually peltately attached.
    3. Indusia attached at base and sides (tubular); rhizomes 5-20 mm in diameter; fronds quite large, 12 to 50 cm wide… 2 Davallia
    3. Indusia attached at base (scale-like); rhizomes 1-3 mm in diameter; fronds small, usually 2-8 cm wide… 3. Humata

    1. ARAIOSTEGIA Copel. 小膜蓋蕨屬

    Epiphytes or growing on moss-covered rocks or old logs; rhizomes fleshy, creeping , densely covered with thin, lanceolate scales; c. s. of rhizome roumd, with a ring of 8-12 vascular bundles, 2 larger and 6-10 smaller bundles; c. s. of stipe oval, with 2 large bundles and 4 smaller ones. Fronds deltoid, finely dissected, texture thin. Sori submarginal, small, terminal on veinlet; indusia small, thin, round to subdeltoid, attached only at base.
    About 12 species, one in Taiwan.

    1. Araiostegia parvipinnata (Hayata) Copel. In Philip. Journ. Sci. 34: 24. 1927. 台灣小膜蓋蕨 Pl.74
    Davallia parvipinnata Hayata, Mat. Fl. Form. 431. 1911.
    Leucostegia parvipinnnata (Hayata) Hayata, Icon. Pl. Form. 4: 205. f. 139. 1914.
    Araiostegia perdurans (Christ) Copel. In Univ. Calif. Publ. Bot. 12: 397. 1931; DeVol & Yang in F1. Taiwan 1: 278. pl. 95. 1975.
    Rhizome scales nearly entire, brown. Stipes 15-30 cm long, sparingly scaly near base; fronds deltoid, 20-35 cm long by 18-30 cm broad; with thin brown ovate-lanceolate scales at base of pinnae and pinnules; scales often hair-tipped; ultimate segments acute.
    Distributed in Southwest China and Taiwan.
    TAIPEI: Wulai, Suzuki 7095. ILAN: Taipingshan, Kao 4724. HSINCHU: Tapachienshan, Kuoh 3315. TAOYUAN: Peichatienshan, Kao 432. NANTOU: Wushe, Masamune 2329; Wanhsiang, Shieh & Tsai 8992*. CHIAYI: Mt. Alishan, DeVol 3322; Nanhushanchuan, Hsu 6059. TAITUNG:Kweihu, Kuo 114; Ramaramani, Kao 6841. HUALIEN: Taroko, Lu et al. 69; Tapilin, Kao 7745.