首頁   計劃介紹    

English Version

Plants of Taiwan

  • plantname
  • planetbook
  • 回目錄頁

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

      / 1090
    last page

    上一頁

    台灣植物誌第二版  Flora of Taiwan, 2nd edition  3: 780

     88. ELAEAGNACEAE 胡頹子科
    LU, SHENG YOU and YANG, YUEN PO

    Shrubs or trees with silvery or brown scales. Leaves alternate or opposite, entire, estipulate. Flowers regular, unisexual or bisexual, axillary, solitary or in fascicles or cymes or racemes, white or yellow; perianth in the bisexual and female flowers tubular, 2-6-cleft, in the male of Hippophae of 2 membranaceous sepals; stamens adnate to the perianth tube, in male flowers twice as many as the lobes, in the bisexual flowers as many as the lobes and alternate with them; ovary free, 1-celled; style filiform, the stigma lateral; ovule 1, basal, erect, anatropous. Fruit indehiscent, enclosed in the perianth -tube; seeds ascending; endosperm lacking or scanty; embyro straight, axile; cotyledons thick.
    Genera 3, in the north temperate and tropical regions; one in Taiwan.

    1. ELAEAGNUS L. 胡頹子屬

    Shrubs or small trees deciduous or evergreen, sometimes spiny, covered with silvery or brownish peltate scales. Leaves alternate, petiolate, entire, estipulate. Inflorescence fasciculate or racemose or umbellate-racemose, or a solitary flower. Flowers regular, bisexual; perianth united at lower part, the tube campanulate or cupulate or funnel-like, 4-lobed, the lobes deciduous, white or yellow inside; stamens 4, the filaments short, inserted near the mouth of perianth tube, alternate with the lobes; ovary 1-locular, 1-ovulate, the style linear, the stigma lateral. Fruit indehiscent, globose to elliptic. Seeds usually ribbed, with a large straight embryo.
    Species around 40 in southern Europe, Asia and North America.

    KEY TO SPECIES
    1. Flowers 1-3 in a fascicle, axillary at the leaves and/or bracteoles.
    2. Plants evergreen; bracteoles present in the inflorescences on the short branches of the year… 5. E. oldhamii
    2. Plants deciduous; bracteoles absent in the inflorescences on the short branches of the year… 9. E. umbellata
    1. Flowers solitary, axillary at the leaves and bracteoles.
    3. Leaves less than 4 cm long… 6. E. tarokoensis
    3. Leaves more than 4 cm long.
    4. Leaves coriaceous.
    5. Leaves obtuse or rounded, partially covered with scales on the abaxial side; style stellate-haired… 2. E. formosensis
    5. Leaves acute, completely covered with scales on the abaxial side; style glabrous.
    6. Leaves broad-elliptic to elliptic, with spreading scales; flowers brownish-yellow… 4. E. grandifolia
    6. Leaves obovate, with bowl like scales; flowers whitish-yellow… 1. E. formosana
    4 Leaves chartaceous.
    7. Leaves ovate (very rarely elliptic to orbicular); fruit 1.8-2 cm long… 8. E. triflora
    7. Leaves elliptic or obovate; fruit 1.4-1.8 cm long.
    8. Scales mostly brown; style glabrous; fruit 1.4- 1.8 cm long, red orange… 3. E. glabra
    8. Scales mostly silvery; style stellate haired; fruit 9-1.3 cm long, red.........................7. E. thunbergii

    1. Elaeagnus formosana Nakai in Bot. Mag. Tokyo 30: 74. 1916; Li in Fl. Taiwan 3: 754. 1977. 台灣胡頹子 Pl.390
    E. pungens auct. non Thunb.: Matsum. & Hayata in Journ. Coll. Sci. Univ. Tokyo 22: 356. 1906.
    E. nokoensis Hayata, Ic. Pl. Form. 9: 92. f. 32. VII. 1920.
    E. kotoensis Hayata, Ic. Pl. Form. 9: 90. 1920.
    Scandent or sometimes erect shrubs; young branches and buds silvery-brown. Leaves coriaceous, obovate to oblanceolate or elliptic to narrowly elliptic, 4-11 cm long, 2-5 cm wide, the mid-rib flat or