Popular Christmas houseplant (10)

I believe the answer is:

poinsettia

(Other definitions for poinsettia that I've seen before include "poisonous bush" , "House plant, popular at Christmas -- tiniest OAP (anag)" , "American plant" , "Ornamental house plant" , "Plant with showy bracts, usu. red, pink or white" .)

I've seen this clue in the King Feature Syndicate.

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