Flora and vegetation of the Vassar College Ecological Preserve (Farm) with Troy Weldy
Sex changing in dwarf ginseng (Panax trifolium)
Reproductive Ecology of American ginseng (Panax quinquefolium)
Reproductive biology of Rocky Mountain Apiaceae
Sexual systems of New Caledonian Araliaceae
Systematics and floral biology of Lomatium (Apiacae)