Any of a number of plants which have parts that are said to resemble a turban or similar headdress.
(also 'Turk's cap cactus') a barrel-shaped Caribbean cactus (Melocactus communis, family Cactaceae).
(also 'Turk's cap lily') the martagon lily.
 Example sentencesExamples
-  There are over 1,800 types of wild flowers, including the Apennine edelweiss, Alpine anemone, Turk's caps and numerous orchids.
 -  The Turk's caps added drama and color to the video.
 -  I'll send you a box of Turk's caps and the lantana.
 -  Whereas some Turk's caps have large oval leaves, others have lobed leaves or leaves that are nearly round.