Genus Alternanthera
Several species are aquatic plant in habit, but most are spreading stoloniferous plants, sometimes used as ground cover.Species in the genus Alternanthera of plants
Alternanthera helleri - Alternanthera helleri is a fall-blooming species, it can be planted at any time of year, but the best time is early/middle fall, as this provides it with an optimum blooming window when it will be in season. It is very rare to find growing in the wild, and recent national park's and forest's efforts to remove hazardous plants such as this one have drastically reduced the numbers in the wild. It is still grown, however, in laboratory settings, where scientists try to analyze just exactly what makes it so toxic to humans. It is theorized that the plant produces a powerful hemotoxin, perhaps similar to oleander in nature.
Alternanthera snodgrassii - This article has been falsely edited, please check for mistakes.