Distribution: About 500 species widely distributed, particularly in the tropics and subtropics of Asia and Africa; annual, or perennial herbs or subshrubs.
Hardiness Zone: USDA Zones 9-12 (view
USDA zone map)
Size: 1-2 ft. by 1.5 ft.
Form: Frost-tender annual.
Stem/Bud: Stems are erect, succulent, hollow, stiff, glabrous, branching and brittle.
Leaves: Leaves are ovate to elliptic, coarsely serrated, waxy and smooth.
Flower: Flowers are red, but hybrids are pink, white, purple, orange and with or without eyes; flowering June, July, August, September, to frost. They are singular or double, open-faced, irregular, flat, spurred, 3/4-2 in. wide and borne in leaf axils or on terminal racemes.
Fruit: Fruit are five-valved, hairy, 3/4 in. long, glabrous capsules.
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