What is pop corn flower?

As an AI language model, I cannot give you specific information about "pop corn flower" as it is not a known term or phrase. However, if you meant "popcorn flower," it is a common name for a North American wildflower called Plagiobothrys arizonicus. It belongs to the borage family and is also known as the creamcups or forget-me-nots. The popcorn flower is a small annual plant that grows up to 18 inches tall and usually blooms between March and July. The flower has small, tubular, white or cream-colored petals, which are arranged in loose clusters on the stem. It is commonly found in desert and mountain areas of the Western United States and is often used for ornamental purposes in gardens.