@article {860, title = {A taxonomic study of the section Hypericum in the eastern United States.}, journal = {Diss. Abstr. Int., B}, volume = {31}, number = {part 11}, year = {1971}, note = {Geog=3KBD, Royal Botanic Gardens, Kew.}, pages = {6451-6452 (1971)}, keywords = {Systematics: ANGIOSPERMAE HYPERICACEAE: HYPERICUM}, author = {Culwell, DE} }