Pittosporum glabrum Hook. & Arn. f. hypoleium O. Deg. & Sherff, in Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 411 1942.
O`ahu, ridge NE of Nu`uanu Pali, on exposed ridge in tapestry forest. 20 November 1926. Degener and Ochiae 10988a.
Holotype
[F].
Pittosporum glabrum Hook. & Arn. f. subcandidum Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 411 1941.
Moloka`i, Manawai-Kahananui Ridge, at edge of moist forest. 600 m. 24 December 1936. Fosberg 13402.
Holotype
[F]. Isotype(s)
[B, BISH!].
Pittosporum glabrum Hook. & Arn. var. glomeratum (Hillebr.) Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 410 1941.
Pittosporum glabrum Hook. & Arn. var. intermedium Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 410 1941.
O`ahu, Wai`anae Range, Palehua. 1-4 April 1911. Forbes 1676.O.
Holotype
[BISH]. Isotype(s)
[B, BISH!, F, K].
Pittosporum glabrum Hook. & Arn. var. spathulatum (H. Mann) Sherff, Amer. J. Bot. 28: 25 1941.
Pittosporum glabrum Hook. & Arn. var. tinifolium Sherff, Field Mus. Nat. Hist., Bot. Ser. 22: 412 1941.
Maui, [East Maui], ridge right side Kipahulu. 17 November 1919. Forbes 1668.M.
Holotype
[BISH]. Isotype(s)
[B, BISH! [2], F, K, UC].