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    台灣植物誌 第二版  Flora of Taiwan, 2nd edition    Vol. 3

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    台灣植物誌第二版  Flora of Taiwan, 2nd edition  3: 158

     56. CONNARACEAE 牛栓藤科
    LI, HUI-LIN

    Trees or climbing or erect shrubs. Leaves persistent or deciduous, alternate, estipulate, simple or imparipinnate, with 1 or more pairs of leaflets; leaflets subcoriaceous, always entire. Flowers small and inconspicuous, racemose or paniculate, usually hermaphroditic, regular or nearly so. Calyx 5-partite, persistent. Petals 5, ligulate and longer than the calyx, usually imbricate, free or slightly coherent. Stamens perigynous or hypogynous, 5 or more; filaments filiform, often monadelphous at base; anthers short, didymous, the dehiscence introrse. Disc 0 or thin, surrounded by the base of the stamens. Carpels usually 5, rarely 1-3, free, hairy, l-celled. Style subulate or filiform; stigma subcapitate, simple or 2-lobed. Ovules 2, collateral, ascending from the base of the inner angle of the cell, orthotropus. Capsules usually solitary, sessile or stipitate, follicular, dehiscing usually in front, 1- or rarely 2-seeded. Seeds erect, with or without an arillus, the embryo erect, albuminous or exalbuminous.
    About 16 genera, 160 species, mainly tropical; only one genus in Taiwan.

    1. ROUREA Aublet 紅葉藤屬

    Woody vines, shrubs or small trees. Leaves odd-pinnate to unifoliolate. Inflorescence axillary or terminal, paniculate, with bracts and bracteoles. Flowers bisexual, 5-merous; sepals imbricate, ovate, acute, usually minutely pubescent without, accrescent in fruit, becoming hard or coriaceous; petals lanceolate, 2-3 times longer than sepals; stamens 10, confluent at base; pistils 5; ovary oblique-ovoid, the style slender, capitate. Fruit ovoid to ellipsoid, usually opening lengthwise by a ventral slit, with thin but hard or coriaceous pericarp. Seed 1, ellipsoid to subglobose, usually flattened; endosperm absent.
    About 90 species in the Tropics of the world. One species is found in Taiwan.

    1. Rourea minor (Gaertn.) Leenhouts in Fl. Males. 1. 5: 514. 1957; Li in Fl.Taiwan 3: 145. 1977. 紅葉藤 Pl.73, Photo 13
    Aegiceras minus Gaertner, Fruct. 1: 216. t. 48. 1788, excl. syn.
    A large woody vine, sometimes a shrub, glabrous or minutely tomentose on young twigs. Leaves unifoliolate or pinnate, glabrous; leaflets 1-9, suborbicular to ovate to lanceolate, variable in size, 1-25 cm long, 0.5-10 cm broad, thin-chartaceous to coriaceous, short- to long-acuminate at apex, acute to cordate and equilateral to oblique at base, the lateral nerves of 4-10 pairs; petiolules 2-6 mm long. Inflorescence to 20 cm long, laxly branched, many-flowered, glabrous; calyx 2-3 mm long; corolla 4-7.5 mm long. Fruit oblique-ovoid, 1-3 cm long, 3-10 mm broad.
    Southeastern Asia through Malaysia to northern Australia. Taiwan in forests on Is. Lanyu (Botel Tobago) and Lutao only.
    TAITUNG: Is. Lanyu, Huang & Kao 5408; Is. Lutao, Hosokawa 9894*, Chuang 2371*.
    This is a very variable species with a wide range. Numerous species segregates have been proposed for this complex.