This name is a synonym of Catapodium rigidum subsp. hemipoa (Delile ex Spreng.) Kerguélen.
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 407859) with original publication details: Bot. J. Linn. Soc. 76: 352 1978.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:881873-1.
This name was in version 1 of The Plant List, record kew-407859.