Perennial aquatic herbs, emergent or (not in Australia) submerged. Stems stoloniferous, rhizomatous or erect. Leaves several at base and 1 on flowering stem, petiolate, sheathed; lamina entire, finely curvinerved, expanded or (not in Australia) linear. Inflorescence an erect spike, spike-like panicle or raceme arising from a sheath-like bract above the cauline leaf or (not in Australia) flowers solitary or paired. Flowers bisexual, homo- or hetero-stylous. Perianth 6-lobed or (not in Australia) 3- or 4-lobed, blue to purple, rarely white, or (not in Australia) yellow; lobes almost free or united into a basal tube. Stamens 6, or (not in Australia) 3 or 1, free or partly connate, inserted on perianth tube; anthers bilocular, basifixed with terminal pores or dorsifixed with longitudinal slits. Ovary superior, unilocular with 1 pendulous ovule or 3-locular with many ovules and axile placentation; ovules anatropous; style simple, upcurved; stigma terminal, 3-lobed. Fruit a nutlet or capsule. Seeds longitudinally ridged; embryo straight; endosperm copious. source: ABRS Flora of Australia Online
| Accepted name | Source |
|---|---|
| Pontederiaceae |
| Common name | Source |
|---|---|
| Water-hyacinth |
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