Daylilies get their name from the fact that each large colorful bloom on the stalk lasts only one day. These plants are native to Asia and have been used in Traditional Chinese Medicine for centuries. The roots and young shoots were given as a pain reliever and as a remedy for edema, difficult urination, mastitis, breast cancer, and other ailments. While the plant is edible, the roots and shoots should not be consumed in large amounts over a long time.
Toxicity
Daylilies are toxic when eaten by cats and cows, due to a neurotoxin causing paralysis and blindness.

Part used::
Roots, Rhizomes

Origin:
Asia, Europe

--------------

Origin:
The Himalaya, Khasi Hills; cultivated in Indian gardens.

Action:
Flower—analgesic, especially in child birth; blood purifier. (Flowers are sold in Chinese food shops as Gum-Tsoy or Gum-Jum.)

1) Hull, Kathleen; Photog. Hull, Meredith /Indiana Medical History Museum: Guide to the Medicinal Plant Garden./ USA: Indiana Medical History Museum. 2010. -- p. 58.

2) Khare, C.P./ Indian Medicinal Plants. -- Nueva Dheli: Springer, 2007 . - p. 836.