crown of thorns or christ plant (euphorbia milii), native to madagascar.

bract breonii christthorn christas thorn christasthorn conservatory cyathia cyme euphorbia milii euphorbieae euphorbioideae garden goniostema hislopii madagascar spurge christ plant thorny toxic africa autumn bloom blooming blossom botany closeup colorful crown of thorns decorative during exotic flora flower flowering houseplant inflorescence ornamental pink poisonous red shot shrub splendens