This name is a synonym of Salix lucida .
The record derives from WCSP (in review) (data supplied on ) which reports it as a synonym with original publication details: Alsogr. Amer. 13 1838.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:776525-1
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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 Diplima lucida in version 1 of The Plant List.