Developmental and Structural Section
Hoyos, Saul .
Anatomical and morphological characteristics among Fusispermum spp. and Rinorea apiculata group (Violaceae) can be useful for understanding the phylogenetic relationships.
Whithin the Violaceae, Fusispermum spp. and Rinorea apiculata clade are strongly supported as being successively sister to the rest of the family; while the monogeneric Goupiaceae are sister to Violaceae. Few comprehensive empirical studies have ever been published on Violaceae, especially on Fusispermum spp. and Rinorea apiculata group. Furthermore, those studies have focused on the most widely available genus Viola, not a typical one in the family, being largely herbaceous and temperate, while most of its members are woody and tropical in distribution. Leaf, seeds, androecium and gynoecium of Fusispermum laxiflorum, F. minutiflorum, F. rubrolignosum, Rinorea apiculata group(R. apiculata, R. crenata), Rinorea s. str.(R. lindeniana, R. squamata, R. paniculata, R. dasyadena, R. viridifolia), and Goupia glabra (Goupiaceae) were examined. Structures in most of these species were illustrated for the first time, namely Fusispermum spp. and the Rinorea apiculata group. This new information may provide characters that can be understood in the context of hypothesis of relationships within Violaceae, and between Violaceae and Goupiaceae. The results of this research show that: G. glabra has a nodal anatomy (3:1) similar to the Violaceae. The petioles of R. apiculata clade have double vascular bundle. Fusispermum spp. has a special adaxial glandular tissue on the leaf. Cuticle of Fusispermum spp. has straight anticlinal walls, and Rinorea spp. has undulate to sinuous anticlinal walls. The androecia of Goupiaceae, Fusispermum spp.and R. apiculata clade has an apical appendage on the anthers. A glandular disc surrounds the ovary in Goupiaceae, Fusispermum spp., R. apiculata clade; in Rinorea s. str. there is a gland adnate to each filament. The ovary of Goupiaceae, Fusispermum spp., and R. apiculata clade are glabrous; in Rinoreas. str. different types of hairs cover the ovary. The seed of Rinorea apiculata clade has different morphology from Rinorea s. str. The flowers on early stages of Fusispermum spp. and Rinorea spp. development are not actinomorphic.
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1 - University Of Missouri Saint Louis, Missouri Botanical Garden, 2012 Maury Avenue 1N, Saint Louis, MO, 63110, USA
Presentation Type: Poster:Posters for Sections
Location: Khorassan Ballroom/Chase Park Plaza
Date: Monday, July 11th, 2011
Time: 5:30 PM