Two native Sennas to consider if you want to attract the Cloudless Sulphur Butterfly (Phoebis sennae) to your garden. The first naturally occurs in 19 Florida counties including Miami-Dade and the Florida Keys. This would be Senna ligustrina or the Privet Senna. It flowers periodically throughout the year and has an upright growth habit up to 8 feet tall. The second is Senna mexicana var. chapmanii or Chapman’s Senna. This species only occurs in Miami-Dade County and The Florida Keys and is considered threatened. It only flowers in the fall and is much more shrub like than Senna ligustrina. It may attain a height of 5 feet and grow equally wide or wider than 5 feet. Both are host plants for the Cloudless Sulphur Butterfly.
Richard Lyons Nursery has both of these Senna species currently in stock.