Description
The Mexican lime tree is exceedingly vigorous; may be shrubby or range from 6 1/2 to 13 ft (2-4 m) high, with many slender, spreading branches, and usually has numerous, very sharp, axillary spines to 3/8 in (1 cm) long. The evergreen, alternate leaves are pleasantly aromatic, densely set; elliptic- or oblong-ovate, rounded at the base, 2 to 3 in (5-7.5 cm) long, leathery; light purplish when young, dull dark-green above, paler beneath, when mature; with minute, rounded teeth and narrowly-winged petioles. Faintly fragrant or scentless, the axillary flowers, to 2 in (5 cm) across are solitary or 2 to 7 in a raceme, and have 4 to 6 oblong, spreading petals, white but purple-tinged when fresh, and 20-25 bundled white stamens with yellow anthers. The fruit, borne singly or in 2's or 3's (or sometimes large clusters), at the twig tips, is round, obovate, or slightly elliptical, sometimes with a slight nipple at the apex; the base rounded or faintly necked; 1 to 2 in (2.5-5 cm) in diameter; peel is green and glossy when immature, pale-yellow when ripe; somewhat rough to very smooth, 1/16 to 1/8 in (1.5-3 mm) thick; the pulp is greenish-yellow in 6 to 15 segments which do not readily separate; aromatic, juicy, very acid and flavorful, with few or many small seeds, green inside.