Weeds, very simply, are plants that grow where you don’t want them. Kentucky bluegrass is fine in the lawn but a weed in the flower border. On the other hand, mosses are beautiful sight in the carefully nurtured woodland garden but undesirable in the lawn. We have to battle almost constantly.

Some weeds were brought over as potential food sources and then went wild. Most smuggled themselves aboard ships headed for the new lands hidden in sacks of grain or in the soil of potted plants. A few even clung to the mud of worker’s shoes.

Weeds flourished, so much that today it is hard to determine which is the native and which is the immigrant. Below is a list of common weeds. Can you distinguish the natives?