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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: 216


    24. GRAMMITIDACEAE ݸ
    CHARLES E.DEVOL
    Mostly small epiphytes growing on tree trunks with mosses and liverworts, or on rocks; rhizome short-creeping or suberect; scales usually opaque or some- times clathrate with clear lumen, stipes tufted or approximate, usually not arti- culate to rhizome, Fronds simple, pinnate or rarely bipinnate, venation often hidden, usually free; patent hairs usually borne on stipe, rachis and one or both surfaces of lamina. Sori round, oval or linear, dorsal or marginal, superficial or immersed; sporangia often setose; spores tetrahedral. Prothallia filamentous, branched, not cordate.
    A family of tropical ferns with about ten genera, six in Taiwan.
    KEY TO THE GENERA
    1. Fronds simple.
    2. Sori round or oval, superficial 3. Grammitis
    2. Sori linear, immersed in 2 grooves, at apical end of frond 5. Scleroglossum
    1. Fronds pinnate to bipinnate.
    2. Sori marginal, immersed in terminal or subterminal cavities . . . . KKKKK .. 4. Prosaptia
    2. Sori dorsal.
    3. Basiscopic margin of fertile pinnae folded back over the sorus KKKK 1. Calymmodon
    @@@3. Fertile pinnae flat.
    4. Each lobe or pinna with only a single vein 6. Xiphopteris
    4. Lobes or pinnae with costa and lateral veinlets 2. Ctenopteris
    1. CALYMMODON Presl c
    Very small epiphytes growing on moss covered tree trunks; rhizome suberect; scales pale brown, narrow, entire; roots densely covered with reddish-brown,hairs; stipes short, tufted. Fronds narrowly linear, acuminate, pinnatifid or pinnate (with adnate pinnae), each lobe (or pinna) with a single vein; costa, margins and both surfaces more or less hairy. Sori elliptic, borne on the upper pinnae, one sorus per pinna, the lower edge of the pinna is folded upward covering the sorus; paraphyses absent.
    KEY TO THE SPECIES
    1. Lobes (or pinnae) distant; glabrescent, hairs very short 1. C. gracillimus
    1. Lobes (or pinnae) approximate; long hairs plentiful 2. C. gracilis
    1. Calymmorlon gracillimus (Copel.) Nakai ex H. Ito in Journ. Jap. Bot. 11: 88.
    1935; Tagawa in Acta Phytotax. Geobot. 15: 186. 1954. Vc