New Zealand Journal of Botany abstracts

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The biology of heterostyly

Fred R. Ganders

Department of Botany, University of British Columbia, Vancouver, B.C., V6T1W5, Canada

Abstract Heterostyly is a genetically controlled floral polymorphism that is known to occur in 24 families of flowering plants. The floral morphs differ reciprocally in stamen and style lengths. They often differ in pollen grain size and production, and may differ in pollen exine sculpturing, pollen colour, presence of starch in pollen, stigmatic papillae, or corolla size or morphology. There are two morphs in distylous plants and three morphs in tristylous plants. Distyly is much more common than tristyly. Tristyly is known to occur only in the Lythraceae, Oxalidaceae, and Pontederiaceae, although there are unconfirmed reports in the Connaraceae and in Hugonia of the Linaceae.

New Zealand Journal of Botany, 1979, Vol. 17:607-35

PDF file of entire paper: medium quality (2598K); (scanned from paper original: notes about this process)

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