Abstract
The floral and pollination biology of three closely related species,Tricyrtis flava, T. nana andT. ohsumiensis, were comparatively investigated. The primary pollinator wasBombus diversus in all the three species observed, andAmegilla sp. also acted forT. ohsumiensis. The flowers ofT. flava andT. ohsumiensis bloom for two days and are protandrous. Thus autogramy seems to be prevented in these species when the larger bees forage on them, though geitonogamy may also occur. On the other hand,T. nana appears to be a primarily self-pollinating species. The flowers of this species open only during one day and are homogamy. The stigmata seem to receive much pollen of their own flower by the visit of bumblebees. Moreover, many flowers ofT. nana fruited without any visit of pollinators.T. nana has many features characterizing the autogamous derivatives.
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Takahashi, H. A comparative floral and pollination biology ofTricyrtis flava maxim.,T. nana yatabe andT. ohsumiensis . Bot. Mag. Tokyo 100, 185–203 (1987). https://doi.org/10.1007/BF02488323
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DOI: https://doi.org/10.1007/BF02488323