Abstract
A morphological and anatomical study was undertaken on pleiomerous flowers that are produced regularly on several shrubs of a collection of lilac cultivars (Syringa vulgaris, S. villosa, S. prestoniae, and S. amurensis). Because of its frequency and regularity, the anomaly appears to be morphologically significant. Our evaluation of accumulated data leads to the conclusion that this pleiomery must be the result of a process of synanthy in the true sense. These floral concrescences are likely an evolutionary expression of a simplification of the inflorescence in the generally very ramified panicles seen in Syringa. Key words: Syringa, lilacs, floral pleiomery, synanthy.
Published Version
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