2 research outputs found
Floral morphology and development in Aragoa (Plantaginaceae) and related members of the order Lamiales
Inflorescence 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.Peer reviewe
Floral morphology and development in Aragoa (Plantaginaceae) and related members of the order Lamiales
Inflorescence 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.Peer reviewe