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Floral convergence in Oncidiinae (Cymbidieae; Orchidaceae): an expanded concept of Gomesa and a new genus Nohawilliamsia.
BACKGROUND Floral morphology, particularly the angle of lip attachment to the column, has historically been the fundamental character used in establishing generic limits in subtribe OncidiinaeExpand
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Flower Morphology and Pollination Biology of Some Clusia Species from the Gran Sabana (Venezuela)
The flower morphology and its relation to the pollination biology of four species of Clusia (Guttiferae) from the Gran Sabana (Guyana highland) belonging to three sections of the genus is described.Expand
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Phylogenetic Analysis of Inter- and Infrageneric Relationships of Leiothrix Ruhland (Eriocaulaceae)
Cladistic relationships within the family Eriocaulaceae are investigated and discussed. A basal dichotomy dividing the family in two groups, Eriocaulon + Mesanthemum on the one hand, and theExpand
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FLORAL BIOLOGY OF SOME CLUSIA SPECIES FROM CENTRAL AMAZONIA
The floral biology of 3 species of Clusia sect. Chlamydoclusia and 3 species of Clusia sect. Cordylandra from Central Amazonia was investigated. The flowers of both sexes offer resin as the rewardExpand
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The Chemistry of Pollination in Selected Brazilian Maxillariinae Orchids: Floral Rewards and Fragrance
We report the chemical composition of the floral rewards and the fragrance of 10 Maxillariinae (Orchidaceae) species. The species that offer rewards (labellar secretions) are usually scentless, theExpand
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Byrsonic Acid—the Clue to Floral Mimicry Involving Oil-Producing Flowers and Oil-Collecting Bees
Tetrapedia diversipes and other Apidae (Anthophoridae) may be deceived by floral similarities between Malpighiaceae and Orchidaceae of the Oncidiinae subtribe. The latter do not usually exudateExpand
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Antiproliferative properties of polyketides isolated from Virola sebifera leaves
An activity‐guided fractionation of Virola sebifera Aubl. methylene chloride‐soluble fraction provided novel 3,5‐dihydro‐2‐(1′‐oxo‐3′‐hexadecenyl)‐2‐cyclohexen‐1‐one (3), two known lignans (1, 2) andExpand
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Comparative floral structure and systematics in Ochnaceae s.l. (Ochnaceae, Quiinaceae and Medusagynaceae; Malpighiales)
Ochnaceae s.l. (Ochnaceae, Quiinaceae and Medusagynaceae), one of the well-supported subclades of the large order Malpighiales retrieved so far in molecular phylogenetic studies, were comparativelyExpand
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Floral scent of Eleocharis elegans (Kunth) Roem. & Schult. (Cyperaceae)
The inflorescences of Eleocharis elegans and Eleocharis sellowiana were investigated by dynamic headspace/GCeMS for the presence of volatiles. No floral volatile was detected in the inconspicuousExpand
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Polyisoprenylated benzophenones from Clusia floral resins.
From the floral resins of various Clusia species, seven polyisoprenylated benzophenones were isolated. HPLC allowed their quantification in all resins, revealing a distribution of benzophenoneExpand
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