What is "turk's turban"

Turk \Turk\, n. [Per. Turk; probably of Tartar origin: cf. F. Turc.]

1. A member of any of numerous Tartar tribes of Central Asia, etc.; esp., one of the dominant race in Turkey.

2. A native or inhabitant of Turkey.

3. A Mohammedan; esp., one living in Turkey.

   It is no good reason for a man's religion that he was born and brought up in it; for then a Turk would have as much reason to be a Turk as a Christian to be a Christian.
   --Chillingworth.

4. (Zo["o]l.) The plum weevil. See Curculio, and Plum weevil, under Plum. Turk's cap. (Bot.)

   1. Turk's-cap lily. See under Lily.

   2. A tulip.

   3. A plant of the genus Melocactus; Turk's head. See Melon cactus, under Melon. Turk's head.

      1. (Naut.) A knot of turbanlike form worked on a rope with a piece of small line.
         --R. H. Dana, Jr.

      2. (Bot.) See Turk's cap

      3. above.

         Turk's turban (Bot.), a plant of the genus Ranunculus; crowfoot.