Heliopsis helianthoides (L.) Sw. (syn: Buphthalmum helianthoides L. (ambiguous synonym); Helepta angustifolia Rafin.; Helepta grandiflora Rafin.; Helepta parviflora Rafin.; Helianthus laevis L. (ambiguous synonym); Heliopsis helianthodes (L.) Kuntze; Heliopsis helianthoides (L.) Britt., Stern & Pogg.; Heliopsis helianthoides var. solidaginoides (L.) Fern.; Heliopsis laevis (L.) Pers. (ambiguous synonym); Heliopsis oppositifolia (L.) Druce (ambiguous synonym); Rudbeckia oppositifolia L.; Silphium helianthoides L.; Silphium solidaginoides L.);      
Canada (Ontario), USA (Alabama, Arkansas, Connecticut, Delaware, Georgia,
Illinois, Indiana, Kentucky, Louisiana, Maryland, Massachusetts, Michigan,
Mississippi, Missouri, New Jersey, New York, North Carolina, Ohio, Pennsylvania,
South Carolina, Tennessee, Vermont, Virginia, West Virginia, Wisconsin), England
(I), France (I), Denmark (I), Germany (I), Austria (I), Italy (I), Poland (I),
Hungary (I), Belarus (I), Moldova (I), Ukraine (I), European Russia (I),
Colombia (I), Korea (I) as
per Catalogue of Life;



Asteraceae for ID : New Windsor, New York : 19SEP19 : AK-07 : 2 posts by 1 author. Attachments (4)

Cultivated plant with bright yellow flowers.

Seen in June, 2017 during my visit.

The closest I could come on searching is Heliopsis helianthoides ‘Summer Nights’.


Asteraceae for ID : New Jersey : 09OCT19 : AK-10 : 4 posts by 3 authors. Attachments (2)
Asteraceae seen at Somerset County Park in June, 17.

Have posted similar ones from New Windsor, New York.
These were taken from a distance.

For your Windsor, New York plant, you have suggested Heliopsis helianthoides ‘Summer Nights’

Heliopsis helianthoidesPrairie Sunset’  also looks close.
Looks like a Cultivar of Heliopsis Species only. 

based on just these pictures I cant tell you which cultivar. you should no either


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