|A young plant in bloom|
Aesculus pavia, known as red buckeye or firecracker plant, is a species of deciduous flowering plant. The small tree or shrub is native to the southern and eastern parts of the United States, found from Illinois to Virginia in the north and from Texas to Florida in the south.It is hardy far to the north of its native range, with successful cultivation poleward to Arboretum Mustila in Finland.
It has a number of local names, such as scarlet buckeye, woolly buckeye and firecracker plant.
The red buckeye is a large shrub or small tree. It reaches a height of 16-26 feet, often growing in a multi-stemmed form. Its leaves are opposite, and are composed usually of five elliptical serrated leaflets, each 4-6 inches long. It bears 4-7 inches long clusters of attractive dark red tubular flowers in the spring. The flowers are hermaphrodite. The smooth light brown fruits, about one inch or so in diameter, reach maturity in early autumn.
There are two varieties:
- Aesculus pavia var. pavia: typical red buckeye.
- Aesculus pavia var. flavescens: yellow-flowered red buckeye.
The yellow-flowered variety, var. flavescens, is found in higher country in Texas, and hybrids with intermediate flower color occur.
The flowers are attractive to hummingbirds as well as bees. The fruits are rich in saponins, which are poisonous to humans, although not particularly dangerous because they are not ingested easily. The oils can be extracted to make soap, although this is not viable commercially.
Ornamental cultivars such as the low-growing 'Humilis' have been selected for garden use.
Red buckeye has hybridized with common horse-chestnut (Aesculus hippocastanum) in cultivation, the hybrid being named Aesculus × carnea, red horse-chestnut. The hybrid is a medium-sized tree to 45-55 feet tall, intermediate between the parent species in most respects, but inheriting the red flower color from A. pavia. It is a popular tree in large gardens and parks, most commonly the selected cultivar 'Briotii'. Hybrids of red buckeye with yellow buckeye (A. flava) have also been found, and named Aesculus × hybrida.
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