Helianthus Angustifolius, or more commonly know as Swamp Sunflower, is a forb/herb (a forb/herb is a non-woody plant that is not a grass) with dark green foliage and yellow flowers of the genus Helianthus. It has a moderate growth rate and a height of 5.6 feet at maturity. Its duration is perennial which means it will grow year after year. It's active growth period is spring and summer, blooms during late summer and is somewhat tolerant of shade. Helianthus Angustifolius or Swamp Sunflower's floral region is North America US Lower 48, specifically in the states of Alabama, Arkansas, Delaware, Florida, Georgia, Illinois, Indiana, Kentucky, Louisiana, Maryland, Missouri, Mississippi, North Carolina, New Jersey, New York, Ohio, Oklahoma, Pennsylvania, South Carolina, Tennessee, Texas and Virginia.
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