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Monoecious annual herbs. Leaves alternate, crenate, deeply toothed or lobed. Capitula unisexual, discoid. Male capitula terminal, spherical, many-flowered; phyllaries few, free; receptacular scales present; corolla 5-dentate. Female capitula axillary, 2-flowered; involucre enclosing and surrounding the 2 flowers, covered with hooked bristles; corolla 0; pappus 0. Achenes obovoid or oblong, enclosed in the persistent hard involucre which bears many hooked spines.Unusual-looking plants, atypical for Asteraceae.


Creative Commons Attribution Non Commercial 3.0 (CC BY-NC 3.0)

© Mark Hyde, Bart Wursten and Petra Ballings

Source: Flora of Zimbabwe

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