Final answer:
Blue Bonnet is the brand of margarine that shares its name with the state flower of Texas.
Step-by-step explanation:
The brand of margarine that shares its name with the state flower of Texas is Blue Bonnet. Blue Bonnet margarine is named after the Bluebonnet flower, which is the state flower of Texas. Blue Bonnet margarine is commonly used in cooking and baking, and it is known for its creamy texture and rich flavor.