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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: 131


    16. DICKSONIACEAE F߿
    CHARLES E. DEVOL
    Tree feros with tall stout trunks or prostrate rhizomes, covered with a mass of hairs, stipes not articulate to rhizome .. Fronds large, tripinnatifid; veins free. Sori marginal or. submarginal, terminal on veinlets; indusia 2 lobed, outer lobe a continuation of the leaf margin and bent at about right angles to leaf surface; sporangia gradate, annulus complete, oblique; paraphyses abundant, spores trilete.
    1. CIBOTIUM Kaulf.
    Rhizome prostrate or erect; base of stipe and rhizome covered with a mass of long hairs. Fronds deeply tripinnatifid. Sori with indusia of two equal or unequal lobes. A genus of about 10 species found in SE Asia, Hawaii and Central America, two in Taiwan.
    .KEY TO THE SPECIES
    1. Spores with equatorial ridge; pinnules on either side of rachillae of the lower pinnae of about equal length; pinnule lobes with several pairs of sori. . . . . . . . . . . K..1. C. barometz
    1. Spores without equatorical ridge; pinnules on acroscopic side of rachillae of the lower
    pinnae much longer than those on the basiscopic side; pinnule lobes with only 1 or 2 sori.
    . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2. C. cummgu
    1. Cibotium barometz (L.) J. Sm. in Lond. Journ. Bot. 1: 437, 1842; Beddorne, Handb. Ferns Brit. India 24. 1892; Holtt., Fl. Mal. 2: 114. f. 45. 1954; in Fl. Malesiana II. 1(2): 165. f. 33. 1963; Shieh in Quart. Journ. Chin. For. 6(4): 87.1973 (in part); Chen & Huang in Taiwania 19(2): 195. pl. 3. f. 1-3. 1974.

    Polypodium barometz L., Sp. Pl. 2: 1092. 1753.
    Rhizome stout, prostrate; stipe and rachis green, turoing purplish beneath (with age); with a continuous or broken row of linear aerophores on each side of stipe, base of stipe covered with a mass of long (1.0-1.5 cm) shiny brown hairs, upper part of stipe and rachis covered with small, appressed flaccid hairs becoming glabrescent; c. s. of stipe with a long linear 3-lobed, wavy bundle. Fronds tripinnatifid, 1.5-3 m long; glaucous beneath, pinnae stalked, medial pinnae 40-80 cm long, lower pinnae shortened, deflexed; pinnules short stalked, usually of about equal length on either side of rachilla; ultimate segments apiculate, margins: serrulate-serrate; veinlets free, fertile ones simple, sterile often once forked. Sori of several pairs on pinnule lobes; indusia outer lobe usually larger; spores with equatorial ridge annulate or annulotrilete; exine with proximal face bearing 3 rows of short laesural ridges, distal face with a distal ridge.