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虎刺梅(Euphorbia milii)又名虎刺、铁海棠、老虎簕、麒麟花、花麒麟、麒麟刺,为大戟科、大戟属肉质小灌木;茎直立或稍具攀缘性,高1米左右;皮刺锥形,坚硬,褐色。叶倒卵形至矩圆状匙形,生于嫩枝上,叶面光滑。二岐聚伞花序生于枝条顶端,花序有长梗;总苞片基部有2苞片,苞片鲜红色,倒卵状圆形,径1～1.2厘米;花小,不显著;美丽的苞片是其主要观赏部位,除红色外,还有黄、白、粉、绿、复色等;蒴果扁球形。在适宜的条件下,一年四季都可开花,尤以冬、春季为盛。虎刺梅的园艺品种很多,其形态有一定的变化,如大基督虎刺梅,株高可达2米,茎较为粗壮,叶片、苞片都很大;而小基督虎刺梅植株较纤细。此外,还有塔城虎刺梅、紫红衣虎刺梅等品种。
Euphorbia milii (also known as tiger thorn, Begonia, Tiger 簕, Kirin flower, unicorn, unicorn thorn, Euphorbiaceae, Euphorbia fleshy shrubs; stems erect or slightly climbing, 1 meter high About; prick conical, hard, brown. Leaves obovate to oblong-spatulate, born on shoots, leaf surface smooth. Epiphyllous cymbidium was born at the top of branches, inflorescences long stems; involucral bracts basally 2 bracts, bracts bright red, obovate-rounded, diameter 1 ~ 1.2 cm; flowers small, insignificant; beautiful bracts Film is its main ornamental parts, in addition to red, there are yellow, white, pink, green, complex color; capsule flat ball. Under suitable conditions, flowers can bloom throughout the year, especially in winter and spring as Sheng. Tiger thorn plum variety of horticultural, its morphology has some changes, such as the Greater Christ Hu prickly heat, the plant height up to 2 meters, the stem is relatively thick, leaves, bracts are large; and small Christ Tiger thorn plant more slender . In addition, there Tacheng Tiger thorn plum, purple tiger thorn plum and other varieties.