Final answer:
A red, circular patch of small blisters caused by a vegetable parasite, also known as tinea or ringworm, is a fungal skin infection characterized by a red ring.
Step-by-step explanation:
A red, circular patch of small blisters caused by a vegetable parasite is commonly known as tinea or ringworm. This condition is a type of fungal infection that affects the skin. The name ringworm comes from the characteristic red ring that appears on the skin, not because an actual worm is involved. Tinea can affect different parts of the body and is named accordingly, such as tinea pedis (athlete's foot) or tinea capitis (scalp ringworm).