The Collaborative International Dictionary
firebush \firebush\ n.
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An evergreen South American shrub * Streptosolen jamesonii) having showy trumpet-shaped orange flowers; grown as an ornamental or houseplant.
Syn: marmalade bush, Streptosolen jamesonii.
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A densely branched Eurasian plant ( Bassia scoparia) whose foliage turns purple-red in autumn; also called burning bush.
Syn: summer cypress, burning bush, belvedere, Bassia scoparia, Kochia scoparia.
Wikipedia
Bassia scoparia ( syn. Kochia scoparia) is a large annual herb in the family Amaranthaceae native to Eurasia. It has been introduced to many parts of North America, where it is found in grassland, prairie, and desert shrub ecosystems. Its common names include burningbush, ragweed, summer cypress, mock-cypress, kochia, belvedere, Mexican firebrush, and Mexican fireweed.