Key lime
 The Key lime (Citrus × aurantiifolia) is a citrus species with a globose fruit 2.5–5 cm in diameter (1–2 in) that is yellow when ripe but usually picked green commercially. It is smaller and seedier with a higher acidity a stronger aroma and a thinner rind than that of the Persian lime (Citrus × latifolia). It is valued for its unique flavor compared to other limes with the Key lime usually having a more tart and bitter flavor.