Water-primrose (Ludwigia species) is a group of very similar non-native plants, L. grandifolia, L. peploides and L. hexapetala, that are invasive in wetland ecosystems.

As a sign of success, Meisler points to the return of otters and osprey to the laguna and recreational use by kayaks and canoes in areas once choked by the weed, Ludwigia, which grew to be 5 feet ...

But the plant in question, a rare aquatic species of the genus Ludwigia, newly reported from the north Kerala belt of the Western Ghats, shows why conservation is important.

Erik Hawk, assistant manager with the Marin/Sonoma Mosquito and Vector Control District, wades into acres of invasive Ludwigia in search of mosquito larvae in the Laguna de Santa Rosa north of ...