Two New Species of Vincetoxicum (Apocynaceae-Asclepiadoideae) from Japan

  • YAMASHIRO TADASHI
    Biological Institute, Graduate School of Science, Tohoku University
  • YOKOYAMA JUN
    Division of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University
  • MAKI MASAYUKI
    Division of Ecology and Evolutionary Biology, Graduate School of Life Sciences, Tohoku University

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説明

Two new species, Vincetoxicum izuense and V. hoyoense, are described here. Vincetoxicum izuense is a twining perennial herb on rocky beaches and on the margins of thickets near the sea and is endemic to the southern Izu Peninsula. It resembles V. sublanceolatum and V. japonicum, but V. izuense is distinguished from them by the leaves, follicles and trichomes on the lower surface of the leaves. Vincetoxicum hoyoense is a large, perennial, twining herb on rocks and on the margins of thickets facing the sea and is endemic to the area around the Bungo Channel. Vincetoxicum hoyoense resembles V. japonicum f. puncticulatum and V. sublanceolatum, but V. hoyoense can be distinguished from them by the larger, elliptic or ovate leaf blades with shallowly cordate base and the longer corolla lobes. Although V. hoyoense also resembles V. izuense in flower, morphology and leaf shape, V. hoyoense is easily distinguished from it by the large ovate or elliptic leaves with shallowly cordate base and the large corollas.

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詳細情報 詳細情報について

  • CRID
    1390001205270321792
  • NII論文ID
    110006318314
  • NII書誌ID
    AA11586265
  • DOI
    10.18942/apg.kj00004622799
  • ISSN
    21897042
    13467565
  • 本文言語コード
    en
  • データソース種別
    • JaLC
    • CiNii Articles
  • 抄録ライセンスフラグ
    使用不可

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