THE SCREW BEAN.
P. pztbescens, Benth.
The screw-bean or screw-pod mesquite is a small slender trunked tree with sharp spines at the bases of the hoary foliage. The marked distinction between this species and the preceding one is in the fruit, which makes from twelve to twenty turns as it matures, and forms when ripe a narrow straight spiral, one to two inches long; but when drawn out like a coiled spring the pod is shown to be more than a foot in length. These sweet nutritious pods are a
most useful fodder for range cattle, and the wood is used for fencing and fuel. This tree grows from southern Utah and Nevada through New Mexico and Arizona into San Diego County, California, western Texas and northern Mexico.