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

抄録

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.

収録刊行物

• Acta Phytotaxonomica et Geobotanica

  Acta Phytotaxonomica et Geobotanica 55 (1), 1-8, 2004

  日本植物分類学会

キーワード

• Bungo Channel
• Izu Peninsula
• new species
• Vincetoxicum

詳細情報

• CRID: 1390001205270321792
• NII論文ID: 110006318314
• NII書誌ID: AA11586265
• DOI: 10.18942/apg.kj00004622799
• ISSN: 21897042
• ISSN: 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