. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 582 Citrus Fruits with age. The leaves, which usually have wingless petioles, are dark green and shining, eUiptic-oval, often bluntish at each end, wavy or shghtly toothed on the margin. The flowers are in axillary clusters of 3 to 10, the calyx 4- or 5-toothed; corolla white throughout; the 4 or 5 petals are oblong and rather fleshy; stamens about 25, small, their filaments united into several groups; ovary short, about
. North American trees : being descriptions and illustrations of the trees growing independently of cultivation in North America, north of Mexico and the West Indies . Trees. 582 Citrus Fruits with age. The leaves, which usually have wingless petioles, are dark green and shining, eUiptic-oval, often bluntish at each end, wavy or shghtly toothed on the margin. The flowers are in axillary clusters of 3 to 10, the calyx 4- or 5-toothed; corolla white throughout; the 4 or 5 petals are oblong and rather fleshy; stamens about 25, small, their filaments united into several groups; ovary short, about 10- celled. The fruit is usually short-oval, about 4 cm in diameter, the rind light yellow, rather thin, often roughened; flesh greenish, very juicy and acid. The Lime is a native of India and southeastern Asia, but has been cultivated in tropical countries for a long period, the fruit being of much importance as the basis of cooling acidulous drinks. 5. CITRON — Citrus medica Linnaeus The Citron is sparingly cultivated and occasionally spontaneous in peninsular Florida. It is usually a shrub, rarely becoming a small tree 4 meters tall. The trunk is short; the branches are thick, irregular, rather straggling and very thorny, the bark thin and Hght gray. The twigs are stiff, smooth and purplish at first. The leaves have wingless petioles, are oval-ob- long, I to dm. long, sharp- pointed, toothed or usually entire, dark dull green above, paler be- neath. The flowers are rather large in compact axillary clusters of 3 to 10, often imperfect; calyx cup-shaped; corolla tinged with purple outside, white within, the petals oblong, their apex incurved; stamens about 40, included; ovary 9-to i2-celled. The fruit is oblong, to 2 dm. long, blunt at the apex; lind very thick, roughened and light yellow externally, white. Fig. 538. — Citron. and fleshy inside, the pulp very juicy, acid and bitterish or sweetish; seeds oval, nearly white and smooth. The Citron, which is the most t
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