This name is a synonym of Croton socotranus var. pachyclados (Radcl.-Sm.) Radcl.-Sm..
The record derives from WCSP
(data supplied on 2012-03-23)
which reports it as a synonym (record 50742) with original publication details: Hooker's Icon. Pl. 7: t. 3699 1971.
Full publication details for this name can be found in IPNI: http://ipni.org/urn:lsid:ipni.org:names:343144-1.
This name was in version 1 of The Plant List, record kew-50742, and has not been changed.