In the past this name has been erroneously used to refer to Platanus racemosa Nutt..
The record derives from WCSP (in review)
(data supplied on 2012-03-23)
which reports it as a misapplied name with original publication details: Bot. Beechey Voy. 160 1833.
This name record (from WCSP (in review)) was not included in version 1 of The Plant List. It is possible the same name was included from a different data source, to check this you can search for Platanus occidentalis in version 1 of The Plant List.