Turk's cap
Turk's cap is a common name for several plants and may refer to:
 Lilium martagon, a lily species native to a wide area from central Europe east to Mongolia and Korea
 Lilium michauxii, a lily species native to southeastern North America
 Lilium superbum, a lily species native to eastern and central regions of North America
 Melocactus, "Turk's-cap cactus"
 Malvaviscus, "Turk's cap mallow"

See also
 Turban squash, a variety of squash also referred to as "Turk's turban"