Crownridge Canyon Park. A number of Texas Mimosas are around the parking lot and the restrooms, but appear absent from the rest of the park. Commonly confused with Mimosa borealis, this is the other Pink Mimosa of the Texas Hill Country. The two are easily told apart once you know the differences.

Texas Mimosa is the larger and more prickly of the two species. It usually has a single recurved prickle directly below leaf nodes, the branches are usually dark-colored and often have a zigzag habit. The branches usually grow up and then curve sideways and grow laterally. The seedpods are usually grouped together with numerous pods, the pods usually straight with prickles along the margins.

For comparison, Mimosa borealis has prickles at random along the stems, most prickles are not recurved or only slightly recurved, the branches are light-colored without any zigzag habit, the plant is more upright by comparison, not arching sideways. The foliage has an airy, feathery look to it, different from all other Acacias/Mimosas, due to comparetively larger gaps between individual leaflets. The seedpods are not in large groups, unarmed, and usually curved, with the individual pods each on a small stalk.

Distinguishing Mimosa borealis from Mimosa texana:
http://www.biosci.utexas.edu/prc/digflora/mimosa/mimosa-dif.html