The kumquats are slow-growing, evergreen shrubs or small trees, that can grow up to 2.5-4.5 m tall, with dense branches, sometimes bearing small thorns. The leaves are dark glossy green and the flowers are pure white, similar to other citrus flowers, borne singly or clustered in the leaf-axils. The edible kumquat fruits closely resembles that of the orange but is smaller and is often oval, 3-5 cm long and 2-4 cm wide. Depending on variety, peel color ranges from yellow to red. The fruits are extremely juicy and tasty and usually have a sweet outer skin, with large, conspicuous oil glands, accompanied by a tart, inner flesh. The fruits are considered ripe when they reach a yellowish-orange stage, and have just shed the last tint of green.

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