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Schematic representation of the experimental design. The clonal fragments of Alternanthera, each consisting of four basal ramets (filled circles) and two apical ramets (open circles) with a stolon apex (horizontal arrow), were grown either with (left) or without (right) competitors (Schedonorus phoenix, vertical arrows) and with stolon connections between basal and apical ramets either intact (top) or severed (bottom).
