@article {2933,
	title = {Pattern of embryo and endosperm formation in Monotropa hypopitys (Monotropaceae) from North America and western Sweden},
	journal = {Amer. J. Bot.},
	volume = {80},
	year = {1993},
	month = {1993///},
	pages = {839 - 846},
	author = {Olson, A. R.}
}
