Bidens aequisquama (USA) ?

Bidens aequisquama (Fernald) Sherff, Bot. Gaz. 64 26 1917. (syn: Bidens aequisquama var. aequisquama ; Bidens rosea var. aequisquama Fernald);

 
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Asteraceae For ID : California : 10NOV14 : AK-23 : 8 posts by 3 authors. Attachments (2).
Cultivated, garden flowers seen at the Golden Gate Park in San Francisco on 30/9/14.
Pink flowers, Plants approx two feet tall.
coreopsis sp
wish you had better more detailed pictures
may be an endangered sp
Thanks ... I will try searching further.
Could this plant be Bidens aequisquama?
Flowers look quite close.
Another post which was lying unid for more than two years.
Or Bidens rosea var. aequisquama?


References:

The Plant List Ver.1.1  GCC  IPNI  GBIF (with type specimen) EOL  Hortipedia
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