Pittosporum sulcatum Sherff , Amer. J. Bot. 28: 26. 1941.
Type information:
Holotype
[BISH]. N. Tsuji s.n.. 16 October 1932. O`ahu: Ko`olau Mts., Wai`anaeuka, on side of Waikane-Schofield Trail, in windy and rainy area at top of ridge.
=Pittosporum glabrum
Pittosporum sulcatum Sherff f. tomentellum Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 510. 1941.
Type information:
Holotype
[F]. O. Degener 11005. 3 July 1923. O`ahu: Honolulu, above Pauoa Flats, in sunny rain forest.
Pittosporum sulcatum Sherff var. remyi Sherff, Amer. J. Bot. 28: 28. 1941.
Type information:
Holotype
[P]. J. Rémy 572. 1851- 1855. O`ahu: s.l..
Pittosporum sulcatum Sherff var. rumicifolium Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 420. 1941.
Type information:
Holotype
[F]. F.R. Fosberg 8973. 30 October 1932. O`ahu: Pauoa, peak at head of Pauoa Flats, in wet forest.680m.
=Pittosporum glabrum