A poinsettia is a tropical plant people bring indoors in winter, especially around Christmas, because the top of the plant turns a bold red — or sometimes white, cream, or pink. Those big coloured parts look like petals, so shops sell it as a "flower"; though actually they are leaves. The true flowers are the little yellow or green bits clustered in the middle, easy to miss. The plant comes from Mexico, and the English name is after Joel Roberts Poinsett, a 19th-century US minister to Mexico, who helped bring it north. In English it is a house-and-holiday word more than a garden-centre science word. Handle it as a pretty plant, not as food: the sap can bother skin and mouths, though it is not the deadly poison some old warnings claimed.

聖誕紅（書面、植物名也叫一品紅）