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This is the first study to deal in-depth with the achene ultra-structure of the genus Launaea Cass. in Egypt. It focuses on 12 taxa belonging to 10 species of this genus. The achene wall anatomy and surface sculpturing of those taxa were studied using scanning electron microscopy (SEM). Important aspects of the investigated taxa based on the achene characters as well as SEM micrographs of the achene surface and anatomical sections are given. Main and secondary costa of the inner achenes are used for easy differentiation between L. intybacea and L. massauensis.

Achene wall anatomy and surface sculpturing of <i>Launaea</i> Cass. (Compositae: Cichorieae) with notes on their systematic significance