Lonicera sempervirens[a] (also coral honeysuckle or trumpet honeysuckle) is a species of honeysuckle native to the eastern United States. It is grown as an plant for wildlife, as it is used by ruby-throated hummingbirds in their natural range. It is also grown as an ornamental for its attractive flowers, especially as a native alternative to the invasive Japanese honeysuckle. Several cultivars have been selected for variation in flower color, including 'Magnifica' (flowers red outside, yellow inside), 'Sulphurea' (yellow flowers), and 'Superba' (bright scarlet flowers).
The plant is evergreen in zones 8 and up and deciduous in colder climates. It is a twining vine growing to 20 ft or more through shrubs and young trees. The leaves are produced in opposite pairs, oval, up to 5 cm long and 4 cm broad; the leaves immediately below the flowers are perfoliate, joined at the base in a complete ring round the shoot. The flowers are produced in clusters of several groups of three together, tubular, 5 cm long, with five small lobes opening at the tip to expose the stamens and stigma; they are bright red to pinkish-red, and pollinated by ruby-throated hummingbirds and insects.
- USDA Plants Profile: Lonicera sempervirens
- Operation Rubythroat "Top Ten" Native Hummingbird Plants: Lonicera sempervirens
- RHS A-Z encyclopedia of garden plants. United Kingdom: Dorling Kindersley. 2008. p. 1136. ISBN 1405332964.
- "RHS Plant Selector - Lonicera sempervirens". Retrieved 26 June 2013.
- Huxley, A., ed. (1992). New RHS Dictionary of Gardening. Macmillan ISBN 0-333-47494-5.[page needed]
- Missouriplants: Lonicera sempervirens
- Harrison, Lorraine (2012). RHS Latin for gardeners. United Kingdom: Mitchell Beazley. p. 224. ISBN 9781845337315.
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