Pittosporum acuminatum H. Mann , Proc. Amer. Acad. Arts 7: 152. 1867.
Type information:
Holotype [CU?]. H. Mann and W.T. Brigham 603. 1864- 1865. Kaua`i: mountains above Waimea.2000 to 3000ft. Isotype(s) [BISH!, GH].

Note: Haas (1977) incorrectly gives date of publication as 1866.

=Pittosporum glabrum
Note: Haas (1977) incorrectly gives date of publication as 1866.

*Verification: R.K. Shannon; Haas, J.E. 1977. Allertonia 1:73-167.

Pittosporum acuminatum H. Mann var. degeneri Sherff, Amer. J. Bot. 28: 20. 1941.
Type information:
Holotype [F]. O. Degener and E. Ordoñez 12617. 31 December 1939. Kaua`i: Koloa, Kalualea, on open, rainy ridge. Isotype(s) [MO!, NY [mfc!]].
=Pittosporum glabrum

*Verification: R.K. Shannon.

Pittosporum acuminatum H. Mann var. leptopodum Sherff, Amer. J. Bot. 28: 20. 1941.
Type information:
Holotype [P]. U. Faurie 1. March 1910. Kaua`i: Waimea.1000m. Isotype(s) [A [2], G-DEL [3]].
=Pittosporum glabrum

*Verification: None.

Pittosporum acuminatum H. Mann var. magnifolium Sherff, Amer. J. Bot. 28: 20. 1941.
Type information:
Holotype [BISH]. J. M. Lydgate s.n.. 1915. Kaua`i: Kalihiwai.
=Pittosporum glabrum

*Verification: R.K. Shannon; Haas, J.E. 1977. Allertonia 1:73-167.

Pittosporum acuminatum H. Mann var. waimeanum Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 429. 1941.
Type information:
Holotype [P]. U. Faurie 3. March 1910. Kaua`i: Waimea.1000m. Isotype(s) [A, BISH!, G-DEL].
=Pittosporum glabrum

*Verification: R.K. Shannon; Haas, J.E. 1977. Allertonia 1:73-167.