California poppy, Eschscholzia Californica,  is used for trouble sleeping (insomnia), aches, nervous agitation, bed-wetting in children, and diseases of the bladder and liver. It is also used to promote relaxation. 

In combination with other herbs, California poppy is used for depression, long-term mental and physical tiredness (neurasthenia), nerve pain, various psychiatric conditions, blood vessel problems, sensitivity to weather changes, and sedation. For enhanced pain-killing and relaxing effect, it may be blended with Jamaican dogwood, Cowslip, Scullcap, and Passion Flower.