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Bailey, L.H. (1949) Manual of Cultivated Plants Revised edition. Macmillan, New York.
Catarino, L. & Martins, E.S. (2010) Pontederiaceae Flora Zambesiaca 13(2) 69-76
Perennial aquatic herbs, rooted or free-floating. Leaves emergent (in ours), floating or submerged; petiole sometimes markedly swollen; lamina linear in some submerged forms, otherwise ovate to ± circular. Flowers 1-several-flowered racemes or spikes. Perianth funnel-shaped, zygomorphic, with a ± curved tube and 6 subequal spreading lobes. Stamens 6. Ovary 3-locular; ovules numerous. Capsule fusiform, covered with withering and persistent perianth. Seeds numerous, small, finely ribbed. Derivation of name: Named after J.A.F. Eichhorn, 1779-1856, a Prussian statesman. Worldwide: 7 species in tropical America Caprivi: 1 taxon. |
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