Citrus × Aurantium

Tree up to 10 m. high, with slender thorns; stem glabrous.

Flowers axillary, large, white, with only 5–12% staminate; stamens 20–25; ovary 10–12-locular.

Fruit subglobose, ± 7 cm. in diameter; peel thick, rough, strongly aromatic, often orange-red at maturity; pulp very sour and bitter.