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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: 359


    34. DRYOPTERIDACEAE 򿹬
    CHARLES E. DEVOL and CHEN-MENG Kuo except as otherwise indicated
    Medium sized terrestrial ferns, rhizomes dictyostelic, covered with persistent leaf bases, usually short and erect, in two genera long creeping; stipes with a ring of several vascular bundles, usually tufted, in two genera distant or approximate, scaly at least at base; scales opaque and quite diverse in size, shape, texture and color; venation free in nearly all genera; rachis deeply grooved on upper side and usually open to receive rachillae grooves. Sori round, dorsal or terminal on veins; indusia round, peltate and centrally attached or attached by a deep sinus, rarely absent, and in one genus globose and stalked.
    A family of at least nine genera, nine in Taiwan.
    KEY TO THE GENERA
    1. Rhizome long creeping; fronds distant or approximate; first pinnule of all pinnae except the basal pair anadromous.
    2. Texture usually coriaceous, glabrous on abaxial side 3. Arachniodes
    2. Texture thin, pubescent along veins on abaxial side 7. Leptorumohra
    1. Rhizome short, erect or suberect; fronds tufted.
    3. Pinnae opposite, perpendicular to rachis; lamina tripinnatifid to S-pinnatifid, each pinnule and pinna bearing a single thin brown scale at its base; pubescent along
    upperside of rachis and rachillae 1. Acrophorus
    3. Not as above.
    4. Indusia globose, stalked 8. Peranema
    4. Indusia lacking or round, attached by a sinus or central ,stalk (peitate).
    5. Veins anastomosing; rachis groove not open to receive costal grooves
    6. Sori in a single medial row on either side of costa .
    ..... ........................................................................................ 4. Cyrtogonellum
    6. Sori multiseriate on either side of costa 5. Cyrtomium
    5. Veins free; rachis groove open to receive rachillae grooves.
    7. First pinnule of all pinnae except the lowest anadromous; rachis
    usually more or less zigzag ...2. Acrorumohra
    7. Fronds 1-pinnate, or first pinnule of all pinnae (except the lowest) catadromous.
    8. Indusia peltate, centrally attached; pinnules often with stiff aristate
    margins 9. Polystichum
    8. Indusia attached by a sinus (rarely absent); margins often serrate,
    not aristate 6. Dryopteris
    1. ACROPHORUS Presl 쿹
    Terrestrial ferns; caudex short, suberect, dictyostelic, covered with large, thin, ovate-lanceolate, reddish-brown scales; stipes tufted, scaly near base, upper scales caducous. Fronds large, tripinnatifid to 5-pinnatifid, pinnae opposite, sessile, with a single thin, brown, more or less reniform scale at the base of each pinna and