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Title

Floral morphology and development in Aragoa (Plantaginaceae) and related members of the order Lamiales

AuthorsBello, María A. CSIC; Rudall, P. J.; González, F.; Fernández Alonso, José Luis
KeywordsAntirrhinum
Aragoa
floral development
floral morphology
Heliohebe
Lamiales
Plantago
Plantaginaceae
Scrophulariaceae
Veronica
Issue Date2004
PublisherUniversity of Chicago Press
CitationInternational journal of plant sciences 165(5): 723–738 (2004)
AbstractInflorescence and floral morphology and development were investigated in Aragoa (Plantaginaceae) and related genera. Each inflorescence of Aragoa is a reduced, axillary raceme, on which the actinomorphic floral apices generally arise successively. The inflorescences of Aragoa and Plantago are polytelic and lateral. The five sepals emerge from the abaxial to the adaxial side of the floral apex, but at maturity, the calyx is actinomorphic. The four stamens arise simultaneously and before emergence of the petals. The four petals emerge unidirectionally united, but the corolla becomes actinomorphic. Aestivation is cochlear ascendent. The two united carpels initiate simultaneously. The abaxial-adaxial inception of the calyx and corolla during early floral development in genera such as Aragoa, Digitalis, Plantago, and Veronica may indicate that the zygomorphic condition is ancestral in those genera. The tetramerous corolla, which is actinomorphic during middle and late development, and the presence of four stamens are possible synapomophies of the clade (Aragoa þ Plantago). Pentamery of the calyx and corolla appears to be plesiomorphic in the broader Aragoa- Angelonia clade. Characters related to development and morphology of inflorescences and flowers of Aragoa are essentially similar to those found in Plantago, which is consistent with the molecular-based sister group relationship between these genera.
Publisher version (URL)http://www.jstor.org/stable/full/10.1086/422046
URIhttp://hdl.handle.net/10261/33293
DOI10.1086/422046
ISSN1058-5893
Appears in Collections:(RJB) Artículos

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