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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: 666

     77. BUXACEAE 黃楊科
    YANG, YUEN PO and LU, SHENG YOU

    Evergreen shrubs or trees. Leaves opposite or alternate, estipulate. Flowers monoecious, small, apetalous; sepals 4 or wanting, or 4-12 (in pistillate flowers); stamens 4 or numerous, opposite to the sepals, the anthers basifixed; ovary supperior, mostly 3-locular; ovules mostly 2, rarely 1, pendulous. Fruit a dehiscent capsule or slightly fleshy. Seed albuminous.
    Six genera, mostly in tropical and subtropical regions, few in temperate areas. Three genera with five taxa in Taiwan.

    KEY TO GENERA
    1. Leaves opposite… 1. Buxus
    1. Leaves alternate.
    2. Leaves dentate; inflorescence spicate… 2. Pachysandra
    2. Leaves entire; inflorescence subcapitate… 3. Sarcococca

    1. BUXUS L. 黃楊屬

    Evergreen shrubs. Leaves opposite, coriaceous, entire; petioles short. Inflorescence in axillary or terminal clusters, with unisexual flowers. Staminate flowers lateral in inflorescence; sepals 4, imbricate. Pistillate flowers terminal in inflorescnce; sepals 6, imbricate; ovary 3-locular, the ovules 2 in each locule, the styles 3, short. Fruit a dehiscent capsule. Seeds black.
    About 30 species in the world. Three taxa in Taiwan.

    KEY TO SPECIES
    1. Leaves more than 3 cm long, subcoriaceous; the length of rudimentary pistil less than half that of calyx… 1. Buxus liukiuensis
    1. Leaves less than 3 cm long, coriaceous; the length of rudimentary as long as that of calyx.
    2. Plant erect; leaves more than 2 cm long… 2a. Buxus microphyll ssp. sinica var. sinica
    2. Plant dwarf, prostrate; leaves less than 2 cm long… 2b. Buxus microphylla ssp. sinica var. tarokoensis

    1. Buxus liukiuensis Makino in Bot. Mag. Tokyo 16: 179. 1902; Sasaki in Trans. Nat. Hist. Soc. Form. 18: 179. 1928. 琉球黃楊 Pl.344
    Buxus microphylla Sieb. & Zucc. var. sinica auct. non Rehd. & Wils.: Hayata, Gen. Ind. Fl. Form. 65. 1916. pro parte.
    Buxus intermedia Kanehira, Form. Tree rev. ed. 359. f. 383 315, B & C. 1936. pro parte.
    Buxus liukiuensis Makino var. longipedicellata Hatusima in Journ. Agr. Kyusyu Univ. 6(6): 293. 1942.
    A shrub; branchlets quadrangular, slightly pubescent. Leaves ovate lanceolate to lanceolate, subcoriaceous, 3-3.5 cm long, 0.6-1.5 cm wide, emarginate to obtuse at the apex, acute to cuneate at the base; petioles about 1 mm long, sparsely pilose. Inflorescence a axillary raceme; rachis densely pilose. Staminate flowers 6-8 in inflorescence; sepals orbicular to ovate, convex, pubescent at dorsal side, 2-2.5 mm long; stamens about 4 mm long, the anthers about 1.2 mm long; rudimentary ovary with a style about 1 mm long. Pistillate flowers terminal in inflorescence; sepals ovate, convex, sparsely pilose at dorsal side, 2.5-3 mm long; stigma obcordate.
    Endemic. Throughout the island at low to medium altitudes.