@article{black-schaefer_beckmann_1989, title={Foliar flavonoids and the determination of ploidy and gender in Fraxinus americana and F. pennsylvanica (Oleaceae)}, volume={54}, number={2}, journal={Castanea}, author={Black-Schaefer, C. L. and Beckmann, R. L.}, year={1989}, pages={115} }