Chapman's cassia
Cassia chapmanii
This is also known as Bahama senna, and is a great attractor for several sulphur butterflies including the cloudless sulphur, sleepy orange and orange barred. The adults nectar on the flowers while the caterpillars eat the leaves.
It grows to two and a half feet tall on average in full sun and likes well drained yet fertile and moist soil. Drought is tolerated yet water may need to be added if this continues.
This is a long lived woody shrub found in the Rocklands of Dade County. Stem borers may need treatment along with an insect that eats the flower buds. Watch for scale insects on the stem which will kill the plant.
Try a mass planting with firebush, key’s porterweed, and bloodberry. This is also a nice addition to a rock garden or garden mimicing the Key’s. Lignum vitae, thatch palms, quailberry, golden creeper etc. make great combinations with this plant.