@article {KNZ00289, title = {Distribution of polyploid variation in big bluestem (Andropogon gerardii , Poaceae) across the tallgrass prairie region}, journal = {Genome}, volume = {33}, year = {1990}, pages = {95 -100}, keywords = {LTER-KNZ, tallgrass prairie}, doi = {10.1139/g90-015}, author = {Keeler, K.H.} }