Tetrameranthus (Westra, Lubbert Y.T. & Maas, Paul J. M. 2012)
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Name
Tetrameranthus Westra, Lubbert Y.T., 2012 – Wikispecies link – Pensoft Profile
- Tetrameranthus Westra, Lubbert Y.T., 2012, PhytoKeys 12: 3-4.
Description
Description. Trees or shrubs. Leafy twigs and most floral parts sparsely to densely covered with stellate to simple hairs to glabrous. Leaves spirally arranged, often concen trated towards the end of the branches, primary vein impressed to slightly raised on the upper side. Inflorescences axillary, 1-flowered to several-flowered and umbel-like, bracts up to 4 below the articulation. Flowers bisexual, 4-merous or less often 5-6-merous, white to yellow or cream; sepals 4(-6), imbricate, free or basally connate; petals 8(-12), free, subequal, imbricate, much longer than the sepals, often with a callus at the inner base; stamens numerous, connective shield discoid, either flat, cushion-shaped, or with a conical prolongation; carpels c. 5-30, ovules 1-2(-3), lateral, stigma sessile, more or less lobed. Fruit apocarpous; monocarps 1-15, free, sessile or sometimes narrowed into a short and thick stipe-like base, indehiscent, sometimes constricted, wall rather thick (1-7 mm) and fleshy. Seeds 1-2(-3) per monocarp, lower one near the base, upper one(s) lateral.
Distribution
Distribution. Seven species in the Amazon regions of Venezuela, Colombia, Brazil, Peru, and Ecuador, but also in the Colombian state of Choco and in French Guiana and neighboring Amapa, Brazil.
Taxon Treatment
- Westra, Lubbert Y.T.; Maas, Paul J. M.; 2012: Tetrameranthus (Annonaceae) revisited including a new species, PhytoKeys 12: 3-4. doi
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