The bark of the mature black locust is colored dark reddish-brown to black to grey, depending on the tree, and is heavily grooved and scaly. The bark of younger black locust trees is colored lighter brown.Click to see full answer. Then, what does a locust leaf look like? New Mexico Locust It has showy, usually pink to red flowers, but some trees can have white or purplish flowers. Pods are 2 to 4 inches long and have a narrow wing. The compound leaves have nine to 15 leaflets, and the branches have spines at the base of the leaves.Likewise, do all locust trees have thorns? Locust trees are simply described as deciduous trees that produce long, compound leaves, each of which has the ability to sprout a total of 21 leaflets. There are many of its species that are often armed with thorns which are typically almost three inches in length. Beside this, how can you tell the difference between a black locust and a honey locust? One can also tell the two trees apart by just looking at the bark. The black locust’s bark is dark in colour with grooves that resemble an intertwining rope. The honey locust’s bark is brown or grey in colour and the tree has Â bunches of thorns. Both the black and honey locust have smooth, thin, shiny seedpods.Are locust trees messy?The reasons for regret when it comes to selecting a tree can be varied, but the main reasons cited when afterthoughts occur are: The tree is messy. Most everyone expects to rake up leaves from a deciduous tree, but you might be surprised by fruit, berries, or seed pods that make a huge mess of your yard each year.