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native plant database: Bransford, W.D. and Dolphia Silphium
perfoliatum L. USDA Symbol: sipe2 USDA Native Status: Native to
U.S. A coarse perennial, 3-6 ft. tall with numerous large,
yellow composite flowers. Each flower head has 20-30 yellow rays
and darker yellow disks. Stout leaves are joined at stem to form
a small cup that holds water and attracts birds. The small cup
formed by the leaves holds water and attracts birds. Plant
CharacteristicsDuration: Perennial Habit: Herb Size Notes: Can
grow to as much as 9 ft. Fruit: Size Class: Bloom
InformationBloom Color: Yellow Bloom Time: Jul , Aug , Sep AL ,
AR , CT , GA , IA , IL , IN , KS , KY , LA , MA , MD , ME , MI ,
MN , MO , MS , NC , ND , NE , NJ , NY , OH , OK , PA , SD , TN ,
VA , VT , WI , WV Canada: ON Native Distribution: S. Ont. to NC,
w. to e. Great Plains Native Habita