Final answer:
Blue Bonnet margarine shares its name with the state flower of Texas, the bluebonnet.
Step-by-step explanation:
The brand of margarine that shares its name with the state flower of Texas is Blue Bonnet margarine. The state flower of Texas is the bluebonnet, a wildflower known for its vibrant blue color and distinct shape. Blue Bonnet margarine is named after this iconic flower, and it is a popular brand of margarine in many parts of the United States.