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Plants of Taiwan

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    台灣植物誌 第一版  Flora of Taiwan, 1st edition    Vol. 1

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    台灣植物誌第一版  Flora of Taiwan, 1st edition  1: 476


    37. ASPLENIACEAE K
    CHARLES E. DEVOL and CHEN-MENG Kuo
    Terrestrial, petrophilous or epiphytic ferns of a wide variety of forms; rhizomes dictyostelic, creeping or erect; scales usually clathrate, narrowly lanceolate, dark brown to black. Fronds simple, pinnate to decompound; stipes not articulate to rhizome, with two vascular strands at base of stipe, uniting to form an X-shaped strand in upper stipe; venation usually free and forking. Sori linear, borne on side of a veinlet; indusia linear, narrow.
    Containing the one large genus Asplenium and about eight small genera; only one genus in Taiwan.
    1. ASPLENIUM L. K
    Rhizome creeping, or short and erect; mostly terrestrial or growing on rocks, some epiphytic on tree trunks; scales clathrate, dark brown to black; margins of bases of pinnae or pinnules continuous with rachis groove. Fronds simple, longitudinally cleft, trifoliate, or pinnate to decompound, sometimes proliferous at apex; venation free except in a few species where the tips of the veins unite to form an intramarginal vein. Sori linear, borne on side of a vein; indusia linear, narrow, usually opening towards the midrib.
    A genus of about 650 species, 33 in Taiwan.
    KEY TO THE SPECIES
    1. Fronds simple, entire or nearly so; usually widest near middle, tapering to either end; stipes tufted.
    2. Large epiphytes, 1-2 m long, 10 cm or more wide; apices of the parallel veins uniting to form an intramarginalline.
    3. Sori extending 2/3 of way from costa to margin; basal scales nearly entire .
    . . . . . . . . . K4. A. antiquum
    3. Sori extending about 1/2 way from costa to margin; margins of scales bearing long
    hair-like projections ...16. A. nidus
    2. Lamina to 30 cm long, 1-3 cm wide; veins free.
    3. Stipes very short.
    4. Undersurface of lamina without scales K10. A. ensiforme
    @@@@4. Undersurface of lamina sparsely covered with small scales .
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . KKKKKKKK..13. A. griffithianum
    3. Stipes 10-18 cm long ...12. A. formosae
    1. Fronds variously cleft or lobed to decompound.
    2. Fronds longitudinally cleft into narrowly linear segments .
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . KKKKKKKK...24. A. septentrionale
    2. Fronds not longitudinally cleft.
    3. Lamina pinnate (pinnae serrate-erenate or not cut more than 1/4 way to costa).
    4. Lamina ending in a distinct terminal pinna.
    5. Pinnae entire or undulate 12. A. formosae
    5. Pinnae serrate.