Native Plants
Help us grow by giving to the Plant Database Fund or by becoming a member
Did you know you can access the Native Plant Information Network with your web-enabled smartphone?
RESEARCH LITERATURE
The Research Literature database was created and funded by the Florida Wildflower Foundation. Use the search features below to find scientific articles on native wildflowers that are commercially available or used in restoration projects.
About Research Literature Frequently Asked Questions Related Links
Floral initiation in Rudbeckia hirta (Asteraceae) under limited inductive photoperiodic treatments
Author(s): R. L. Harkess and R. E. Lyons
Month: Aug
Year: 1994
Journal: American Journal of Botany
Volume: 81
Issue: 8
Pages: 1021-1026
Article Topic(s): Light, Phenology, Propagation
Research Setting(s): Greenhouse
Species Referenced: Rudbeckia hirta (Black-eyed susan),
Abstract
Evaluates the effects of alternating cycles of modified day length on flower development of Rudbeckia hirta in a production environment. Plants receiving 24 or more long days began floral development earlier than plants receiving fewer long days.Suggested Citation
R. L. Harkess and R. E. Lyons. "Floral initiation in Rudbeckia hirta (Asteraceae) under limited inductive photoperiodic treatments." American Journal of Botany 81.8 (1994): 1021-1026.Go back