Not an accepted name (status: rejected).
The accepted name is
Pandanus concretus Baker, 1885.
Pandanus concretus subsp. circularis
(H.St.John) Callm., 2002
2% complete
No common name
Bot. Helv. 112: 64 (2002)
There is no corrections for Pandanus concretus subsp. circularis yet.