The floral biology ofTricyrtis latifolia Maxim. (Liliaceae)
- 56 Downloads
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 wordsBombus Floral biology Geitonogamy Pollination Self-compatible Tricyrtis latifolia
Unable to display preview. Download preview PDF.
- Faegri, K. and L. van der Pijl. The Principles of Pollination Ecology, 2 ed. Pergamon Press, Oxford.Google Scholar
- Huber, H. 1969. Die Samenmerkmale und Verwandtschaftsverhältnisse der Liliifloren. Mitt. Bot. München8: 219–538.Google Scholar
- Hutchinson, J. 1934. The Families of Flowering Plants II. Monocotyledons. Macmillan and Co., London.Google Scholar
- —. 1968. Morphogenic classification of flower types. Phytomorphology18: 451–466.Google Scholar
- ——. 1974. Gene flow in seed plants. Evol. Bio.7: 139–220.Google Scholar
- Melchior, H. 1964. Reihe Liliiflorae.In: Engler's Syll. Pflanzenfam.II: 513–543. Gebrüder Borntraeger, Berlin.Google Scholar
- Proctor, M. andP. Yeo. 1973. The Pollination of Flowers. William Collins Sons and Co., London.Google Scholar
- Takahashi, H. 1980. A taxonomic study on the genusTricyrtis. Sci. Rep. Fac. Educ., Gifu Uuiv. (Nat. Sci.)6: 583–635.Google Scholar
- Waddington, K.D. 1981. Factors influencing pollen flow in bumblebee-pollinatedDelphinium virescens. Oikos37: 153–159.Google Scholar
- Yamauchi, K., Y. Morimoto, K. Watanabe, S. Sakagami andT. Matsumura. 1982. Bee fauna.In. The Environment Preservation Section of Gifu Pref. ed., The Insects in Gifu Prefecture p. 415–430. Gifu Pref., Gifu (in Japanese).Google Scholar