Nototrichium viride Hillebr. , Fl. Hawaiian Isl. 373. 1888.
Type information:
Holotype [CU]. H. Mann and W.T. Brigham 590. 1864- 1865. Kaua`i: Hanapepe. Isotype(s) [B [PD, fragment BISH!], BISH!, K [photos BISH!, F], NY, US].

Note: Not sure how it was determined that the BISH "clastotype" is from the B sheet of N. viride Hillebr., as the "Ex Museo botanico Berolinensi" label is completely blank.

=Nototrichium sandwicense
Note: Not sure how it was determined that the BISH "clastotype" is from the B sheet of N. viride Hillebr., as the "Ex Museo botanico Berolinensi" label is completely blank.

*Verification: R.K. Shannon.

Nototrichium viride Hillebr. var. kalaupapae H. St. John, Phytologia 45: 295. 1980.
Type information:
Holotype [BISH]. B. Harrison and W.C. Gagné s.n.. 8 March 1974. Moloka`i: Kalaupapa, `Uau Crater [Pu`u Uao], inside crater.
=Nototrichium sandwicense

*Verification: R.K. Shannon.

Nototrichium viride Hillebr. var. oblongofolium Sherff, Bot. Leafl. 2: 3. 1950.
Type information:
Holotype [G-DEL]. U. Faurie 1070. March 1910. Kaua`i: Waimea, rocky places of mountains. Isotype(s) [BISH! [photos BISH!, F]].
=Nototrichium sandwicense

*Verification: R.K. Shannon.

Nototrichium viride Hillebr. var. subtruncatum Sherff, Bot. Leafl. 2: 4. 1950.
Type information:
Holotype [BISH]. G.W. Russ s.n.. March 1932. O`ahu: Kawaihapae [Kawaihapai].
=Nototrichium sandwicense

*Verification: R.K. Shannon.