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Diagrammatic representation of the experiment with S. latifolia plants of contrasting sexual system. On a given day, either (a) a dioecious or (b) a monoecious array was presented to pollinators. Within each array, there were four sets of four potted plants (each with a single inflorescence) laid out in a square (= one individual), with the nearest distance between individuals being 1 m. Pollinator visits were recorded by an observer (star symbol) sitting just outside the array.
