@article {4832,
	title = {Observations  on Schizaea and Actinostachys spp., including A. oligostachys sp. nov.},
	journal = {Amer. J. Bot.},
	volume = {55},
	year = {1968},
	month = {1968///},
	pages = {87 - 108},
	author = {Bierhorst, D. W.}
}
@article {4230,
	title = {Notes on some American species of Voyria (Gentianaceae)},
	journal = {Ann. Missouri Bot. Gard.},
	volume = {55},
	year = {1968},
	month = {1968///},
	pages = {398 - 400},
	author = {Robyns, A.}
}
@article {3155,
	title = {{\"U}ber die Plastiden von Neottia nidus-avis},
	journal = {Planta},
	volume = {78},
	year = {1968},
	month = {1968///},
	pages = {134 - 143},
	author = {Menke, W. and Wolfersdorf, B.}
}
@article {2998,
	title = {An investigation of Thismia rodwayi F. Muell. and its associated fungus},
	journal = {Trans. Roy. Soc. New Zealand},
	volume = {3},
	year = {1968},
	month = {1968///},
	pages = {209 - 219},
	author = {Campbell, E. O.}
}
@article {2907,
	title = {Notes on some american species of Voyria (Gentianaceae)},
	journal = {Ann. Missouri Bot. Gard.},
	volume = {55},
	year = {1968},
	month = {1968///},
	pages = {398 - 400},
	author = {Robyns, A.}
}
@article {2772,
	title = {Tropical american plants, IX},
	journal = {Fieldiana. Bot.},
	volume = {31},
	year = {1968},
	month = {1968///},
	pages = {411 - 415},
	author = {Williams, L. O.}
}
