The North American species of the genus Ipomoea. House, H. D. Annals of the New York Academy of Sciences, 18(1):181–263, December, 1908.
The North American species of the genus Ipomoea [link]Paper  doi  bibtex   
@article{house_north_1908,
	title = {The {North} {American} species of the genus {Ipomoea}},
	volume = {18},
	copyright = {© 1908 The New York Academy of Sciences},
	issn = {1749-6632},
	url = {http://onlinelibrary.wiley.com/doi/10.1111/j.1749-6632.1908.tb55102.x/abstract},
	doi = {10.1111/j.1749-6632.1908.tb55102.x},
	language = {English},
	number = {1},
	urldate = {2015-04-06},
	journal = {Annals of the New York Academy of Sciences},
	author = {House, Homer Doliver},
	month = dec,
	year = {1908},
	pages = {181--263},
}

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