You are not currently logged in.
Access JSTOR through your library or other institution:
Reassessing Inflorescence and Floral Morphology and Development in Hedyosmum (Chloranthaceae)
María Gabriela Doria, Natalia Pabón-Mora and Favio González
International Journal of Plant Sciences
Vol. 173, No. 7 (September 2012), pp. 735-750
Published by: The University of Chicago Press
Stable URL: http://www.jstor.org/stable/10.1086/666662
Page Count: 16
You can always find the topics here!Topics: Inflorescences, Perianths, Stamens, Bracts, Ovaries, Pollen, Flower stigma, Carpels, Anthers, Secretion
Were these topics helpful?See somethings inaccurate? Let us know!
Select the topics that are inaccurate.
Preview not available
Hedyosmum (Chloranthaceae), one of the oldest angiosperm lineages, possesses some atypical reproductive features that remain poorly understood, including the inflorescence architecture, the stamen anatomy, and the perianth development around the allegedly inferior ovary. Our developmental survey of these characters with LM and SEM techniques showed that both staminate and carpellate partial inflorescences are indeterminate and suggests that each stamen corresponds to a single, ebracteolate flower. The tapetum is secretory and associated with orbicules; the connective apex is secretory, which—along with the reticulate pollen and the frequent visits of insects—suggests that entomophily should not be ruled out in Hedyosmum. The perianth is formed by three almost completely fused hypogynous tepals; the window is schyzogenous, unique among angiosperms, and according to the fossil record, it has been in the genus since the Early Cretaceous. Unlike any previous description, we found that the ovary is fully superior. The persistent perianth completely surrounds the fruit; in turn, they are tightly enclosed by the fused, acrescent, fleshy flower-subtending bracts, which appear to play a threefold role in protection, secretion, and dispersal.
© 2012 by The University of Chicago. All rights reserved.