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- W1979234480 abstract "Hoya and Dischidia are closely related genera, but molecular phylogenetic analyses have not succeeded in revealing their exact relationship. The morphology of the pollinating apparatus, consisting of guide rails, stamens, pollinaria, and stigmas, of selected species of Hoya and of Dischidia, as well as of Stephanotis floribunda and of Marsdenia cordifolia, is examined and discussed in the light of the mechanisms involved in the pollination of their flowers. Flowers of Hoya have generally lost their inner guide rails, while guide rails in Dischidia are more developed and often provided with inner rails. Nectar in Hoya is produced from a tube in the guide rails but also by secondary nectaries positioned inside the anther skirt. The pollinium in this genus is, in the majority of cases, provided with a pellucid margin that is inserted into the guide rails during pollination. Pollinia of Dischidia have crested caudicles, which because of structural similarity to the pellucid margins of Hoya, are hypothesized to fulfill the same function. Pollinia with pellucid margins together with modified guide rails and secondary nectaries inside the anther skirt support the monophyly of Hoya and point to a systematic position of Dischidia outside this genus in the tribe Marsdenieae." @default.
- W1979234480 created "2016-06-24" @default.
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- W1979234480 date "2009-03-01" @default.
- W1979234480 modified "2023-10-02" @default.
- W1979234480 title "Identifying Synapomorphies in the Flowers of<i>Hoya</i>and<i>Dischidia</i>—Toward Phylogenetic Understanding" @default.
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- W1979234480 doi "https://doi.org/10.1086/596329" @default.
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