Lemons and limes are separate trade identities
Lemons and Persian limes differ in grade language, colour expectations, maturity evidence, juice-content rules and buyer use. USDA lemon grades include U.S. No. 1, U.S. Export No. 1, U.S. Combination and U.S. No. 2. USDA Persian-lime grades use U.S. No. 1, U.S. Combination and U.S. No. 2 with Mixed Color and Turning designations where applicable. Atlas preserves species, variety and exact grade rather than applying one citrus specification to the other.