Nemastylis nuttallii, the Nuttall's pleatleaf,[1] Ozark celestial-lily or pine woods lily, is a plant species native to Arkansas, Missouri and Oklahoma in the south-central United States.

[2] Some authors have mistakenly called this species N.

[3] Nemastylis nuttallii is a bulb-forming perennial herb up to 40 cm (3 feet) tall.

Leaves are very narrow and linear.

Flowers are pale blue, opening in the evening.