is a specific kind of: aquatic plant, hydrophyte, hydrophytic plant, water plant.

is a broader term that covers: lesser spearwort, Ranunculus flammula | greater spearwort, Ranunculus lingua | Caltha palustris, cowslip, kingcup, marsh marigold, May blob, meadow bright, water dragon | rush | Acorus calamus, calamus, flagroot, myrtle flag, sweet calamus, sweet flag | Calla palustris, water arum, wild calla | Lysichiton americanum, skunk cabbage | foetid pothos, polecat weed, skunk cabbage, Symplocarpus foetidus | iva, marsh elder | sedge | cattail | sabbatia | yellow-eyed grass | Alisma plantago-aquatica, water plantain | arrow grass, Triglochin maritima | grass-of-Parnassus, parnassia | Chelone glabra, shell-flower, shellflower, snake-head, snakehead, turtlehead | American brooklime, brooklime, Veronica americana | brooklime, European brooklime, Veronica beccabunga | Sium suave, water parsnip | greater water parsnip, Sium latifolium | Sium sisarum, skirret | lizard's-tail, Saururus cernuus, swamp lily, water dragon ... show more.