Abstract
Flower and inflorescence anatomy and morphology of Exostyles, Harleyodendron, Holocalyx, Lecointea, and Zollernia (Leguminosae, Lecointea clade) were studied. Features common to all genera but otherwise rare within the Leguminosae include: (1) the presence of phenolic compounds in the epidermal cells of the anthers and subepidermal cells of the bracteoles, sepals, petals, and ovaries (absent in Holocalyx balansae); (2) simple trichomes on the adaxial base of the bracteoles and on the surface of the calyx and ovaries; and (3) tapetum persisting until the androspores are formed. Other notable anatomical features are: (1) colleters on the adaxial bases of the bracts and bracteoles of Holocalyx balansae and Zollernia ilicifolia; (2) trichomes on the anthers of Harleyodendron unifoliolatum, Holocalyx balansae, Lecointea hatschbachii, Zollernia ilicifolia and Z. magnifica; (3) osmophores on the petals of Exostyles godoyensis; (4) asynchronous pollen development in the anthers of Holocalyx balansae and Zollernia magnifica; and (5) vascular bundles surrounded by lignified fibers in Harleyodendron unifoliolatum. These anatomical characters are discussed according to their possible phylogenetic implications.
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Acknowledgments
We thank Maria Dolores Seabra Ferreira, José Augusto Maulin, Vani Maria Alves Corrêa (BCMBP, FMRP-USP) and Elliot Watanabe Kitajima (NAP/MEPA, ESALQ) for their technical assistance and Benjamin Torke for reading a previous version of the manuscript. Finally, we would like to express our thanks to the two anonymous reviewers for their useful comments. The first author thanks FAPESP (process number 98/07780) and Petrobras (agreement Petrobras/Rio de Janeiro Botanical Garden: 610.4.025.02.3) for financial support.
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de Freitas Mansano, V., de Pádua Teixeira, S. Floral anatomy of the Lecointea clade (Leguminosae, Papilionoideae, Swartzieae sensu lato). Plant Syst Evol 273, 201–209 (2008). https://doi.org/10.1007/s00606-008-0018-y
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DOI: https://doi.org/10.1007/s00606-008-0018-y