Disparity in floral traits and breeding systems in the iconic columnar cactus Pachycereus pringlei (Cactaceae)

摘要

Highlights?Floral polymorphism and different breeding systems characterizeP. pringlei..?Dimensions of reproductive and vegetative traits increase northwards latitudinally.?Pollen:ovule ratios denoted predominance of outcrossing in bisexual flowers.?Shorter stamen-stigma distance in hermaphroditic populations may be ancestral.?The biogeography of this cactus resulted from past factors and life history traits.AbstractStudies on breeding systems and flower morphology are valuable to infer how environmental factors impose evolutionary change in plants. This study focused on the characterization of floral morphs and reproductive systems inPachycereus pringleiand how this iconic columnar cactus might be a useful genus to understand the evolution of these h