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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: 240


    26. DENNSTAEDTIACEAE J
    WANG-CHUENG SHIEH
    Terrestrial. Rhizome slender, creeping or erect, solenostelic or rarely dictyostelic, clothed withP hairs or mixed narrow scales. Fronds pinnate, to pinnately decompound, not articulate, to rhizome; veins free or anastomosing without included free veinlets. Sori terminal on the veins, with a cup-shaped or 2 lipped indusium, or the lower lip lacking, or the other continuous along the margin and on the connecting-vein, protected by the reflexed margin or with double indusium; sporangia developing in gradate or mixed sequence, with almost vertical annulus; spores tetrahedral or rarely bilateral.
    A family of about 15 genera and 300 species, mainly tropical in distribution; seven genera and 24 species in Taiwan.
    KEY TO THE GENERA
    1. Sod terminal on the veins, with cup-shaped or half-cup-shaped indusium or exindusiate.
    2. Sori protected by a cup-shaped or half-cup-shaped indusium.
    3. Sod marginal 1. Dennstaedtia
    3. Sori intramarginal .. 4. Microlepia
    2. Sod exindusiate (without true indusium).
    3. Rhizome without true hails, spores tetrahedral . . . . . . . . . KKKK.... 5. Monachosorum
    3. Rhizome clothed with hairs, spores bilateral 3. Hypolepis
    1. Sod marginal, continuous along the margin, on a marginal connecting-vein, protected by the reflexed margin.
    2. Rhizome clothed with hairs, sod with an inner (true) indusium.
    , 3. Rachis zigzag, spores-bilateral KK.... . . . . . . . ..............6. Paesia
    3. Rachis straight, spores tetrahedral , . . 1. Pteridium
    2. Rhizome clothed with scales, sod without an inner (true) indusium 2. Histiopteris
    1. DENNSTAEDTIA Bernh. J
    Rhizome creeping, solenostelic, clothed with rather stiff dark hairs. Fronds usually large, hairy or naked, more or less deltoid, pinnately decompound; veins free. Sori marginal, terminal on the veins; indusium formed by the fusion of an indusium in the strict sense and a minute tooth, to form a cup-shaped or slightly bivalate structure, usually deflexed towards the lower surface of the lamina, annulus of 12-28 thickened cells; spores tetrahedral.
    About 70 species, nearly all tropical, ranging north to Japan and the United States, south to Chile and Tasmania, four species in Taiwan.
    KEY TO THE SPECIES
    1. Stipe and rachis hairy.
    2. Frond up to 2 m long .4. D. smithii