Paintbrush (Carphephorus corymbosus)

Full sun
Low water needs
Bloom time: Late summer to fall
Size: Up to 3' tall

Great for attracting butterflies. Provide full sun to minimal shade. Will self seed after blooming. 

Price: $6.99 1 gallon
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https://flawildflowers.org/flower-friday-carphephorus-corymbosus/
https://florida.plantatlas.usf.edu/Plant.aspx?id=2091