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Germination constraints of dicarpic cypselae of Bidens pilosa L

Braz. j. biol; 79 (3), 2019
Abstract Bidens pilosa L. is a heterocarpic weed species with two cypselae types that present morpho-physiological differences, being the peripheral type smaller and slower to germinate than the central one. We aimed to verify how the germination mechanism varied between types. We focused on two mechanis...