This name is a synonym of Acorus calamus var. angustatus Besser.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 2301) with original publication details: Rep. Exped. Manchoukuo Sect. iv 4: 105 1936.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:84006-1.
This name was in version 1 of The Plant List, record kew-2301, and has not been changed.