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- W2000480775 abstract "The Echinocereus viridiflorus complex is morphologically distinct from other members of the genus. Temporal differences in flowering preclude natural interspecific hybridization between taxa of the E. viridiflorus complex and sympatric congeners. All taxa within the complex are xenogamous and self-incompatible. Considerable taxonomic disagreement exists among herbarium and field botanists with regard to species boundaries and infraspecific classification of the taxa constituting the E. viridiflorus complex. One author views the complex as consisting of a single species, E. viridiflorus while other authors additionally recognize E. chloranthus, E. russanthus, and E. davisii. Pollination in E. viridiflorus is by solitary halictid bees. Photographs taken with a filter transmitting long-wave ultraviolet (UV) light revealed two floral patterns among entities of the complex: entirely UV-absorbing tepals and tepals with UVreflective outer segments and UV-absorbing centers (target-type blossoms). We suggest that UV-floral patterning increases pollinator visitation and efficiency. Six flavonol-O-glycosides and two dihydroflavonol-7-O-glycosides were localized in tepal tissue. No qualitative differences were seen either between differentially UV-patterned flowers or among E. viridiflorus, E. chloranthus, E. davisii, and E. russanthus. Flavonoid evidence indicates that these taxa are" @default.
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- W2000480775 date "1982-11-01" @default.
- W2000480775 modified "2023-09-27" @default.
- W2000480775 title "POLLINATION BIOLOGY AND CHEMOTAXONOMY OF THE ECHINOCEREUS VIRIDIFLORUS COMPLEX (CACTACEAE)" @default.
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- W2000480775 doi "https://doi.org/10.1002/j.1537-2197.1982.tb13419.x" @default.
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