| Noun | 1. | Sagittaria - genus of aquatic herbs of temperate and tropical regions having sagittate or hastate leaves and white scapose flowersliliopsid genus, monocot genus - genus of flowering plants having a single cotyledon (embryonic leaf) in the seed Alismataceae, family Alismataceae, water-plantain family - perennial or annual aquatic or marsh plants common arrowhead - a weed |