Carolyn A. Wessinger

The paper examines reproductive isolation in hybrid zones of two Penstemon species, finding that floral divergence is decoupled from genomic barriers.

This study identifies four independent origins of hummingbird syndrome in Penstemon and finds rapid floral trait convergence without stepwise modification or adaptive introgression.

This study investigates the morphological basis and evolutionary history of personate flowers in Penstemon, finding distinct morphological mechanisms and multiple independent evolutionary origins.

The paper establishes predictive relationships between petal color and pigment quantities in Penstemon hybrids using spectral reflectance and anthocyanin measurements.