Aquatic milkweed (Asclepias perennis) a great Florida native milkweed, but quite a different species from Swamp Milkweed (A. incarnata). As its common name implies, aquatic milkweed occurs in a variety of wetland habitats, including semi-shaded forests in native Florida habitats which experience drought before rainy season commences to which it can handle from my experience. It can survive lower amounts of direct sunlight than our other native species.  It can become lankier during the season but still a terrific native as it is available all year to our beloved Monarchs. Aquatic milkweed can tolerate 2-3 months of drought in our Florida sandy soils but also does very well in extremely wet and nearly underwater conditions during the Florida rainy seasons.  It has some drought tolerance and is more easily grown than swamp milkweed, especially in the winter months when the Pink swamp milkweed is dormant. A mature height in the late spring can reach about 2 feet. Each is densely covered by lance-shaped bright green leaves approximately 2 inches in length. I have witnessed during milkweed research studies this plant with seed pods and flowers during the Florida winter. The flowers are bright white and very cute. This wildflower is commonly propagated for home gardeners and is quite hardy.  I plant it in shady areas around my yard that get a mix of sun and shade as well as some areas that are full sun - the plants do well in pretty much any condition Florida seems to throw at it.  If you have sprinklers hitting it regularly, it will receive enough water from my experience of having it side by side with 7 other milkweed species.