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Pollination biology of Opuntia imbricata (Cactaceae) in southern Colorado


, : Pollination biology of Opuntia imbricata (Cactaceae) in southern Colorado. Candian Journal of Botany 67(1): 24-28

The floral phenology, compatibility system, and pollinator fauna of Opuntia imbricata (Haw.) DC. in southern Colorado were studied. The plants bloom for approximately 4 weeks in June and July. Opuntia imbricata sets numerous seeds when it is open-pollinated or experimentally cross-pollinated; it is self-incompatible and not apomictic. The most effective pollinators were found to be medium to large bees of the genera Diadasia and Lithurge; beetles are ubiquitous on flowers of O. imbricata, but probably do not effect pollination because they rarely move from flower to flower and usually restrict their activities to the stamens and base of the inside of the flowers.

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Accession: 001912579

DOI: 10.1139/b89-004

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