A gall is an abnormal growth or swelling of a plant caused by hormones released from insects, mites, bacteria, or nematodes. They can appear on any part of the plant with vast variation in morphology, ...

Reviewed by Debra LaGattuta Fact checked by Jillian Dara Mexican petunia, also known as Mexican bluebell, is not actually a petunia but is rather a highly adaptable, fast-growing perennial known for ...