@article {38049,
	title = {Pollen morphology of the Rosaceae of western Canada. IV. Luetkea, Oemleria, Physocarpus, Prunus},
	volume = {69},
	year = {1991},
	pages = {2583-2596},
	publisher = {Canadian Journal of Botany},
	url = {http://article.pubs.nrc-cnrc.gc.ca/RPAS/RPViewDoc?_handler_=HandleInitialGet\&calyLang=eng\&journal=cjb\&volume=69\&articleFile=b91-322.pdf},
	author = {Hebda, R. J. and Cinnappa, C.. C. and Smith, B. M.}
}
