Hooked Spine Arrangement of <i>Uncaria rhynchophylla</i> (<i>Rubiaceae</i>)

DOI

Bibliographic Information

Other Title
  • カギカズラ（アカネ科）の鈎の配列について

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Description

<p>Uncaria rhynchophylla (Rubiaceae) is a liana that climbs by means of hooked spines. The spines have been used as an important crude drug in China and Japan. In stems growing horizontally, nodes with a single spine and nodes with two spines appear alternately, but in stems growing upright, nodes with two spines are continuous. The unique arrangement of spines has been interpreted variously. A new idea on the alternating single and double spines is proposed. The leaves of U. rhynchophylla are decussate. If the two opposing leaves of a pair from a single node lean on the objective (the host), one of the leaves in the succeeding pair of leaves may not come in contact with the host. This appears to be the reason for the alternating nodes with single and paired spines. In the former case, production of spines is restrained during the early stages of growth and development.</p>

Journal

Details 詳細情報について

  • CRID
    1390293821444865920
  • DOI
    10.51033/jjapbot.92_5_10820
  • ISSN
    24366730
    00222062
  • Text Lang
    ja
  • Data Source
    • JaLC
  • Abstract License Flag
    Allowed

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