This name is a synonym of Hylodesmum laxum subsp. falfolium (H. Ohashi) H. Ohashi & R.R. Mill.
The record derives from Tropicos
(data supplied on 2012-04-18)
which reports it as a synonym (record 50120256) with original publication details: J. Jap. Bot. 70(3): 145, f. 1 1995.
This name was in version 1 of The Plant List, record tro-50120256, and has not been changed.