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- [3] SCANNING ELECTRON MICROSCOPY OF POLLEN AS AN AID TO SYSTEMATICS OF VERNONIA (COMPOSITAE) BULLETIN OF THE TORREY BOTANICAL CLUB, 1970, 97 (06): : 325 - &
- [7] A TRI-SPECIES HYBRID POPULATION OF VERNONIA (COMPOSITAE) AMERICAN MIDLAND NATURALIST, 1969, 82 (01): : 258 - &