Plantago pachyphylla A. Gray f. crassicaudex Rock, Amer. J. Bot. 7: 208 1920.
Maui, Mt. `Eke. August 1918. Rock 16008.
Holotype
[BISH].
Plantago pachyphylla A. Gray f. intermedia Rock, Amer. J. Bot. 7: 207 1920.
Kaua`i, Wai`ale`ale. 20 October 1911. Rock 8891a.
Holotype
[BISH].
Plantago pachyphylla A. Gray f. montis-eeka Rock, Amer. J. Bot. 7: 205 1920.
Maui, West Maui, Pu`u Kukui. 1830 m. 21 August 1910. Rock 8213.
Holotype
[BISH].
Plantago pachyphylla A. Gray f. robusta Rock, Amer. J. Bot. 7: 207 1920.
Maui, West Maui, summit of Mt. Eeke [`Eke].
Syntype
Plantago pachyphylla A. Gray subvar gracilis A. Gray, Proc. Amer. Acad. Arts 6: 55 1862.
Hawai`i 1851- 1855. Rémy 429.
Holotype
[GH].
Plantago pachyphylla A. Gray var. glabrifolia Rock, Indig. trees Haw. Isl. 77 1913.
Kaua`i, Wai`ale`ale. 20 October 1911. Rock 8889.
Holotype
[BISH]. Isotype(s)
[BISH [4], US [2]!].
Plantago pachyphylla A. Gray var. hawaiensis A. Gray, Proc. Amer. Acad. Arts 6: 54 1862.
Hawai`i, in environs of Great Crater. 6000 to 8000 ft. 1840. U. S. Expl. Exped. s.n..
Lectotype
[US]. Isolectotype(s)
[GH]. Lectotypified in H. St. John. Rhodora 87: 594. 1985.
Plantago pachyphylla A. Gray var. intermedia Skottsb., Acta Horti Gothob. 15: 453 1944.
Maui, West Maui, Puu Kukui, in bog on summit. 1750 m. July 1938. Cranwell et al..
Syntype
Plantago pachyphylla A. Gray var. kavaiensis A. Gray, Proc. Amer. Acad. Arts 6: 55 1862.
Kaua`i, mts. [on tabular summit]. 1840. U. S. Expl. Exped. s.n..
Holotype
[US]. Isotype(s)
[GH].
Plantago pachyphylla A. Gray var. maviensis A. Gray, Proc. Amer. Acad. Arts 6: 54 1862.
Maui, East Maui, crater [Haleakala]. 7500 ft. 1840. U. S. Expl. Exped. s.n..
Holotype
[US].
Plantago pachyphylla A. Gray var. minor Pilg., Pflanzenr. IV. 269 (Heft 102): 95 1937.
Maui, Makawao District, Hana Forest Reserve, Wai A`anapapa. 2200 to 2400 m. April 1930. Krajina 114.
Holotype
[B?].
Plantago pachyphylla A. Gray var. muscicola Rock, Amer. J. Bot. 7: 209 1920.
Hawai`i, Kohala Mts., below summit, back of Waimea, in open bog, embedded in thick spaghnum. 1285 m. June 1910. Rock 8315.
Holotype
[BISH]. Isotype(s)
[US!].
Plantago pachyphylla A. Gray var. pusilla Wawra, Flora 57: 568 1874.
Kaua`i, plateau of Wai`ale`ale. 1869- 1870. Wawra 2165.
Holotype
[W].
Plantago pachyphylla A. Gray var. rotundifolia Wawra, Flora 57: 567 1874.
Kaua`i, Wai`ale`ale, high plateau in moss on trunks of trees. 2440 m. 1869- 1870. Wawra 2201.
Holotype
[W].