Proliferating Spike rushes Eleocharis spp Shorelines and shallow water Very difficult to control and unsightly. Rattlebox Sesbania punicea Anywhere Spreads rapidly from seed. Poisonous to livestock, fowl and man. Skunk Vine Paederia foetida Anywhere Overtakes trees. Acts as a ladder for fire to reach tree canopies.
Thick growth can kill under-story plants.
Rhizomes invade other plants crowding them out. Anywhere Rapid spread, invades pasture land. Thorns are dangerous. Each plant can produce 40,000 to 50,000 seeds. Introduced pest which can completely cover pond surface.