@article {261,
	title = {Floral Initiation in Rudbeckia hirta (Asteraceae) Under Limited Inductive Photoperiodic Treatments},
	journal = {American Journal of Botany},
	volume = {81},
	year = {1994},
	month = {08/1994},
	pages = {1021-1026},
	chapter = {1021},
	author = {Richard L. Harkess and Robert E. Lyons}
}
@book {649,
	title = {Asteraceae: Cladistics and Classification},
	year = {1994},
	publisher = {Timber Press},
	organization = {Timber Press},
	address = {Portland, Oregon},
	author = {Bremer, K.}
}
