@book {11854,
	title = {Endangered and Threatened Plants of the United States},
	year = {1978},
	pages = {404},
	publisher = {Smithsonian Institution and the World Wildlife Fund, Inc.},
	organization = {Smithsonian Institution and the World Wildlife Fund, Inc.},
	keywords = {Conservation, Data and statistics, Flora},
	author = {Ayensu, Edward S and DeFilipps, Robert}
}
