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| Rossi,Ana Aparecida B.; Oliveira,Luiz Orlando de; Vieira,Milene F.. |
| Psychotria ipecacuanha is a perennial, medicinal herb that grows in clusters in the understory of humid, shady areas of the Atlantic Rain Forest of southeastern Brazil. The present study characterized the variation in floral traits among 35 clusters from three natural populations of this plant species. Field observations showed that the clusters are isomorphic, that is, a given cluster will either set long-styled or short-styled flowers. Stigmas and anthers are reciprocally placed in each morph, a dimorphism characteristic of distyly. The populations are isoplethic, that is, a given population exhibits an equilibrium 1:1 ratio of floral morphs. Morphometric analyses revealed that anther length, stigma length, corolla diameter, and pollen grain diameter... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Distyly; Floral morphology; Ipecac; Medicinal plants; Psychotria ipecacuanha. |
| Ano: 2005 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-84042005000200009 |
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| Caris, P.L.; Geuten, K.P.; Janssens, S.B.; Smets, E.. |
| The floral morphological and developmental patterns in three species of Impatiens (Balsaminaceae), namely I. columbaria, I. hawkeri, and I. niamniamensis, were studied to contribute to a better understanding of floral evolution in the genus. Strangely enough, the highly diverse floral morphology and ontogeny of this horticulturally important genus have never been studied thoroughly (e.g., using scanning electron microscopic techniques). We discuss the position and the developmental sequence of the different perianth members. We hypothesized that in the course of evolution, the anterolateral sepals become reduced and that a morphocline can be recognized going from species with five sepals, over species with rudimentary sepals that fuse postgenitally with... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Balsaminaceae; Ericales; Floral development; Floral evolution; Floral morphology; Impatiens; Scanning electron microscopy; 42.40. |
| Ano: 2006 |
URL: http://www.repository.naturalis.nl/record/422332 |
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