Cowpea Flower (IMAGE) American Society of Agronomy Caption Cowpea (also known as black-eyed pea) flowers are yellow on the outside, white on the inside. The pods can grow to be 8-10" long, and yield a good amount of high protein beans. Credit Susan V. Fisk Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.