The floral biology ofTricyrtis latifolia Maxim. (Liliaceae)

  • Hiroshi Takahashi


The floral biology ofTricyrtis latifolia was investigated at four sites: Nigorigo, Kurumijima and Hikagedaira-san, Gifu Prefecture, and Jöge, Miyagi Prefecture. The flowers open fully by 3 a.m., and anthesis begins at about 8 a.m. Most pollen is taken away by bumblebees by 10 a.m. The distal parts of the trifid style-branches (each branch is further bifid) and the immature stigmata are above the anthers in the first day flowers. The distal parts of the style-branches with their extension curve downward and are positioned under the anthers on the morning of the second day and the stigmata are fully matured. The flowers wilt by the third day. The primary pollinators ofT. latifolia wereBombus diversus andB. honshuensis in three sites; only the former was a primary pollinator at the Jōge site. Bees forage the first and second day flowers, and their backs contact the anthers and stigmata of the second day flowers while the bees are sucking nectar. Breeding experiments showed thatT. latifolia was fairly self-compatible. The avoidance of autogamy and the possibility of geitonogamy are discussed.

Key words

Bombus Floral biology Geitonogamy Pollination Self-compatible Tricyrtis latifolia 


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Copyright information

© The Botanical Society of Japan 1984

Authors and Affiliations

  • Hiroshi Takahashi
    • 1
  1. 1.Department of Biology, Faculty of EducationGifu UniversityGifu

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