Plantago princeps Cham. & Schltdl. var. aquatilis Wawra, Flora 57: 565. 1874.
Type information:
Holotype [W]. H. Wawra 2013a. 1869- 1870. Kaua`i: Hanalei and Hanapepe waterfalls.
=Plantago princeps var. longibracteata

*Verification: None.

Plantago princeps Cham. & Schltdl. var. denticulata Hillebr., Fl. Hawaiian Isl. 364. 1888.
Type information:
Syntype

Note: Syntypes: "Moloka`i! pali of Pelekunu...; pali of Waikolu."

=Plantago princeps var. laxiflora
Note: Syntypes: "Moloka`i! pali of Pelekunu...; pali of Waikolu."

*Verification: None.

Plantago princeps Cham. & Schltdl. var. hirtella A. Gray, Proc. Amer. Acad. Arts 6: 54. 1862.
Type information:
Holotype [US]. U. S. Expl. Exped. s.n.. 1840. Kaua`i: mts. [on tabular summit]. Isotype(s) [GH].
=Plantago princeps var. anomala

*Verification: R.K. Shannon, W.L. Wagner.

Plantago princeps Cham. & Schltdl. var. laxifolia A. Gray, Proc. Amer. Acad. Arts 6: 54. 1862.
Type information:
Holotype [US]. U. S. Expl. Exped. s.n.. 1840. Hawai`i: [at N base of Mouna Kea, among stones at sea-side]. Isotype(s) [GH].
=Plantago princeps var. laxifolia

*Verification: R.K. Shannon, W.L. Wagner.

Plantago princeps Cham. & Schltdl. var. longibracteata H. Mann, Proc. Amer. Acad. Arts 7: 189. 1867.
Type information:
Holotype [GH]. H. Mann and W.T. Brigham 612. 1864- 1865. Kaua`i: Wai`oli Valley, Hanalei, on wet rocks.
=Plantago princeps var. longibracteata

*Verification: None.

Plantago princeps Cham. & Schltdl. var. queleniana (Gaudich.) Rock, Amer. J. Bot. 7: 199. 1920. Flora of the Hawaiian Islands --Basionym
Type Information
Plantago queleniana Gaudich. , Bot. Voy. Uranie 445, t. 50 1826.
O`ahu: s.l.. 1817- 1820. C. Gaudichaud-Beaupré s.n..
Holotype [P].
=Plantago princeps var. princeps

*Verification: None.
---------------------


*Verification: D.M. Mix.

Plantago princeps Cham. & Schltdl. , Linnaea 1: 167. 1826. Flora of the Hawaiian Islands --Basionym
Type Information

*Verification: None.

Plantago princeps Cham. & Schltdl. f. erecta Wawra, Flora 57: 565. 1874.
Type information:
Holotype [W]. H. Wawra 2013b. 1869- 1870. Kaua`i: Hanalei and Hanapepe waterfalls.
=Plantago princeps var. longibracteata

*Verification: None.

Plantago princeps Cham. & Schltdl. var. acaulis Wawra, Flora 57: 564. 1874.
Type information:
Holotype [W]. H. Wawra 1728a. 1869- 1870. O`ahu: above Pali, on clay location.
=Plantago princeps var. longibracteata

*Verification: None.

Plantago princeps Cham. & Schltdl. var. anomala Rock, Amer. J. Bot. 7: 203. 1920.
Type information:
Holotype [GH]. A.A. Heller 2610. 23 July 1895. Kaua`i: Hanapepe Valley, ridge opposite Gay and Robinson's Hanapepe Valley house. Isotype(s) [A].

Note: Collection 2610, pro parte. Other collections distributed under Heller 2610 were made on the ridge west of Hanapepe River, 22 August (US!), and are not types as they were not cited in the protologue. Holotype not examined, but there is photo of it in Rock's publication. BISH fragment has no locality data or date.

=Plantago princeps var. anomala
Note: Collection 2610, pro parte. Other collections distributed under Heller 2610 were made on the ridge west of Hanapepe River, 22 August (US!), and are not types as they were not cited in the protologue. Holotype not examined, but there is photo of it in Rock's publication. BISH fragment has no locality data or date.

*Verification: Wagner, W.L. & R.K. Shannon. 1999. Brittonia 51:422-438.

Plantago princeps Cham. & Schltdl. var. elata Wawra, . . Flora of the Hawaiian Islands --Basionym
Type Information

*Verification: None.