Common columbine: This plant is most often called common columbine. The name Columbine is evolved from the Latin name, colombina meaning a dove-like plant. Due to its pentagram-shaped flowers and it has five stamens, it is often compared to five groups of pigeons. It's also the most common type of pigeon in the genus, so it's called common columbine.
Granny's bonnet: When you see the flowers, you will feel that it is depressed because its flowers grow in a downward direction. Its flowers are composed of two parts which the inner part is huddled with five petals while the outer part is a circle of outward spreading petals like a hatbrim. As the outer petals are a little wrinkled, it makes the plant look like Granny's bonnet.