Flowers are white with a purple base and fragrant. Meyer lemons are believed to be a cross between a regular lemon and a mandarin orange. They're thought to be a cross between a regular lemon (Eureka and Lisbon variety) and a mandarin orange. It is a cross between a citron and a mandarin/pomelo hybrid distinct from the common or bitter oranges. When mature, the thin peel can be almost orange. Ingredients. The fruit is about the size of a lemon, sometimes slightly smaller, with a smooth, deep yellow peel. They have a smooth, thin rind with a deep yellow hue. Their pulp is pale orange, with a sweet, floral taste. Eureka lemons are definitely of the bitter lemon variety (AKA a “true” lemon) for all they can be pink inside, but the fruit of a Meyer lemon tree tends to be sweeter because it’s actually hybrid between a true lemon and the sweeter mandarin orange. The sour orange (citrus aurantium) has the mandarin orange and pomelo as parents, while the sweet orange (citrus sinensis) has the mandarin orange as a parent and the pomelo as a grandparent. Meyer lemons are a small, sweet hybrid lemon. Meyer Lemons A single Meyer Lemons contains (according to the USDA): 4 grams of total Carbohydrates (1g of which is sugar) 1 gram of dietary fiber 1 gram of protein 19% of the daily requirement of vitamin C 1% of the daily calcium requirement Are full of antioxidants Are believed You'll love the taste of Meyer lemon lemonade and how refreshing it is. The Meyer lemon tree is native to China. These lemons are harder to ship, making them more expensive, but very desirable for many cooks. For example, the Meyer lemon is a hybrid of a citron and a mandarin/pomelo hybrid (so, it includes the genetic lines of all three ancient fruits). Citrus × meyeri, the Meyer lemon, is a hybrid citrus fruit native to China. Mature trees are around 6 to 10 ft (2 to 3 m) tall with dark green shiny leaves. Meyer lemons are technically a hybrid citrus fruit, a blend between lemons and mandarin oranges that originated in China. The flesh and juice are sweeter than a regular lemon and can be used raw or cooked. Where They Come From.