Cloudless sulphur caterpillar on privet senna. Photo by Peg Urban

Flower Friday: Privet senna

Also known as privet wild sensitive plant, privet senna is an evergreen, perennial shrub. Its flowers are mainly bee-pollinated, but it is the larval host plant for the cloudless sulphur and sleepy orange butterflies. It is a short-day plant, which means it requires a longer period of darkness to form its flowers.