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Thunbergia

Acanthaceae
Perennials, Vines

Tropical, typically twining plants noted for showy flowers. Some of the perennial sorts grow fast enough to bloom the first season and can be treated as annuals. Those grown as perennials are evergreen in mildest climates. In cooler part of range, tops may be killed by light frost, but roots usually stay alive to send up new stems. Provide rich, well-drained soil. Good greenhouse plants.

Thunbergia alata
Thunbergia alata

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Thunbergia alata

From tropical Africa. To 10 ft., with triangular, 3-in., medium green leaves. Blooms all summer long; tubular flowers flare out to 1 in. wide, come in white and a variety of colors, all with purple-black throat. Start seed indoors; set plants out in good soil in a sunny spot as soon as weather warms. Display in hanging basket or window box, use as ground cover, or train on strings or low trellis.

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