Aquatic milkweed (Asclepias perennis) a great evergreen Florida native perennial milkweed, but quite a different species from Swamp Milkweed (A. incarnata).  It can survive lower amounts of direct sunlight than our other native species, while also handling full sun. It can become lankier during the season but 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. A mature height in the late spring can reach about 2 - 3' feet. Each is densely covered by lance-shaped deep green leaves approximately 3-5 inches in length. I have witnessed during a few years of milkweed research studies in Central Florida this plant flowers and pushes seed pods in Florida winter months. The flowers are bright white with an occasional hue of pale pink before opening. This wildflower is commonly propagated for home gardeners and is quite hardy. It is also a good specimen for container growing. I plant it in shady areas around my yard that get a mix of filtered 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. This one is my favorite since it grows year round in Florida!