North American Black-Fruited Hawthorns. I. Variation in Floral Construction, Breeding System Correlates, and Their Possible Evolutionary Significance in Crataegus sect. Douglasii Loudon

Differences in the numbers of stamens and styles per flower are conspicuous features of variation in North American hawthorns (Crataegus L.). Variation in stamen number between individuals is discontinuous, with modes of approximately 20 and 10 (or fewer). In North American black-fruited section Dou...

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Veröffentlicht in:	Folia geobotanica & phytotaxonomica 1996-01, Vol.31 (3), p.355-371
Hauptverfasser:	Dickinson, Timothy A., Belaoussoff, Svenja, Love, Rhoda M., Muniyamma, M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Apomixis Biological taxonomies Breeding Crataegus Diploidy Ovules Ploidies Pollen Polyploidy Stamens Tetraploidy
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