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A new species of Primula, P. chimingiana G. Hao, S. Yuan & D.X. Zhang, is illustrated and described from Sichuan province, China. The new species is assigned to P. sect. Petiolares based on general morphology. It is similar to P. odontocalyx in the lack of farina and of hairs, the absence of basal scales at anthesis, and the occasional toothing of the calyx lobes, but can be easily distinguished...
Heterostyly is a floral polymorphism that increase inter‐morph pollen transfer and promote disassortative mating. Breakdown of heterostyly has happened many times, either leading to dioecy or monomorphism. Mussaenda is a genus with diverse sexual systems including distyly, dioecy, floral monomorphism, and homostyly, making it an ideal system to study the evolution of floral traits and their relationship...
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