California Poppy (Eschscholzia Californica) is a typical species of herbaceous plants of the genus Eschscholzia. The stem is straight or branched, smooth, sometimes bluish in color. The root is rod, powerful. A flower is solitary with yellow to orange petals. California Poppy blooms from February to September. The flower closes at night and in cold windy weather, and opens again in the morning, but may remain closed if it is cloudy weather.