High Population Genetic Diversity and Regional Differentiation in the Endemic Vincetoxicum katoi-V. yamanakae Complex (Apocynaceae; Asclepiadoideae) in Japan.
… yamanakae complex might reflect the persistence of refugia since the last glacial period. … In particular, the middle Kinki (Hyogo) population is located outside of known evergreen forest refugia, suggesting that it might have survived during the glacial period within cooler vegetative zones, such as in temperate forests, whereas the populations on the Pacific-side retreated to warm-temperature coastal refugia. …
APG : Acta phytotaxonomica et geobotanica 63(1), 29-40, 2012-10-31
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