This name is a synonym of Valeriana micrantha var. wyomingensis (E.E. Nelson) A. Nelson.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 33500800) with original publication details: Erythea 7(12/1): 167 1899.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:262407-2.
This name was in version 1 of The Plant List, record tro-33500800.