Only three species are included in the genus Strophostyles, and all three are found in Texas. Popularly known as fuzzybeans because of the texture of their seed pods, they can be difficult to distinguish from one another, particularly since their flowers are similar.
One way is to note differences in their leaves and bracts. The amberique-bean, sometimes called the sand or trailing fuzzybean (S. helvola) and the slickseed or small-flower fuzzybean (S. leiosperma) have bracts at the base of the flowers that tend to be acute, while those of the pink, or trailing, fuzzybean (S. umbellata) are more blunt.
I found this pair of what I believe to be pink fuzzybeans near the entrance to the Big Thicket’s Solo Tract on September 6. Despite their small size, their shape and color attracted my attention. Only later did I learn that the Houma people of Louisiana made a decoction of the seeds to treat typhoid, and the Iroquois used the leaves to treat poison ivy rashes. I’m not worried about typhoid, but given my limited ability to spot poison ivy in the wild, a fuzzybean poultice might be as useful as the flower is beautiful.