Asclepias longifolia
PlantsFamily: Apocynaceae · Genus: Asclepias

Photo by and (c)2007 Derek Ramsey (Ram-Man) · cc_by_sa
About
Asclepias longifolia, or the longleaf milkweed, is a flowering plant native to the southern United States from Texas to Delaware. It is rare in the north end of its range and is presumed to be extinct in Delaware.
Summary from Wikipedia
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Growing details and traits for Asclepias longifolia in the Library.
No cultivars in the Library yet — the full profile above covers the species itself.