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- W2078141946 abstract "Field observations revealed the presence of fruit-producing (fruiting) and non-fruit-producing (non-fruiting) plants in two south central Oklahoma populations of Asclepias tuberosa L. Comparative measurements of floral characteristics between fruiting and non-fruiting plants indicated that fruiting plants have significantly larger alar fissure widths and a greater percentage of intact pollinaria. The smaller alar fissure width on flowers of non-fruiting plants apparently reduces the probability of successful pollinia insertions in these plants. Greater numbers of observed pollinia insertions into fruiting-plant fissures appear to be the result of the increased likelihood that pollinia, which are significantly narrower than the fissures of fruiting plants, will be inserted into fruiting-plant fissures than those of non-fruiting plants. Apparently non-fruiting plants act primarily as pollinia donors while fruiting plants act primarily as pollinia recipients. These characteristics of butterflyweed tend to promote a dimorphic, allogamous type of pollination. THE BUTTERFLYWEED, Asclepias tuberosa L., is a herbaceous perennial common to disturbed sites throughout the south central and southeastern United States. According to Woodson (1964), the habitat requirements of A. tuberosa include sunny sites with well-drained soils in eastern parts of its range and more moist, south-facing slopes into Kansas and Oklahoma. During the early summer butterflyweed produces many small orange, less frequently reddish or yellow, flowers displayed in conspicuous broad umbels. Individuals are most often found in small, localized populations which, nonetheless, support many hymenopteran, lepidopteran, and coleopteran floral visitors." @default.
- W2078141946 created "2016-06-24" @default.
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- W2078141946 date "1982-04-01" @default.
- W2078141946 modified "2023-09-27" @default.
- W2078141946 title "EFFECTS OF VARIATION IN FLORAL MORPHOLOGY ON POLLINATION MECHANISMS IN ASCLEPIAS TUBEROSA L., BUTTERFLYWEED (ASCLEPIADACEAE)" @default.
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- W2078141946 doi "https://doi.org/10.1002/j.1537-2197.1982.tb13294.x" @default.
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