Botanical name: Euphorbia milii var. hislopii    Family: Euphorbiaceae (Castor family)
Synonyms: Euphorbia hislopii, Euphorbia splendens var. hislopii

Giant Crown of Thorns is a larger erect variant of the Crown of Thorns. It has thicker stems to 1 m, larger leaves, and bigger bunches of flowers on longer stems. Red flowers bloom for much of the year. It is a succulent subshrub or shrub growing to 5 ft tall, with densely spiny stems. The straight, slender spines, up to 3 cm long, cover the stems. The plant produces milky latex. Giant Crown of Thorns is native of Madagascar.

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The flower labeled Giant Crown of Thorns is ...