Leaves floating, deeply cordate at base.. Inflorescence compound,
pyramidal, consisting of whorls of 3 branches or 3 flowers, subtended
by 3 lanceolate bracts and 2 or 3 smaller bracteoles. Flowers
bisexual. Sepals 3, spreading. Petals 3. Stamens 6. Carpels 10-15
(in ours). Achenes spirally arranged, spongy. Worldwide: 4 species in the Old World tropics Malawi: 1 taxon. |
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