Creeping Waterprimrose
Creeping waterprimrose looks similar to alligator-weed (Alternantltera philoxeroides) in that both have ovate or lance-shaped leaves. Like alligator-weed, which is found along wet habitats including ponds and hydrated soils, it can be prolific. Common near ditch banks, lakes and ponds, waterprimrose sometimes grows so rapidly it can overtake most of a shallow pond. Unlike alligator-weed, waterprimrose is a native to North America.