@inbook {451,
	title = {Heliotropium},
	booktitle = {Flora de Veracruz},
	volume = {18},
	year = {1981},
	month = {1981///},
	pages = {70 - 104},
	publisher = {Instituto Nacional de Investigaciones sobre Recursos Bi{\'o}ticos},
	organization = {Instituto Nacional de Investigaciones sobre Recursos Bi{\'o}ticos},
	address = {Xalapa},
	author = {Frohlich, M. W.},
	editor = {G{\'o}mez-Pompa,A.}
}
