A "collard leaf" refers to a large, dark-green leaf that comes from the collard greens plant. It is commonly used in cooking as a nutritious vegetable or in salads. Full definition
I didn't have more than 2 of those small (each is half of a large collard leaf) wraps, 1/4 c of cuke salad and an 1/8 c of mushrooms (just eye - balling the quantities). (zsusveganpantry.com)