Dubautia laxa Hook. & Arn. , Bot. Beechey Voy. 87. 1832.
Type information:
Lectotype [K]. G.T. Lay and A. Collie s.n.. 1826- 1827. O`ahu: s.l..
Lectotypified in Sherff. Bernice P. Bishop Mus. Bull. 135: 97. 1935. Isolectotype(s) [G! [photo F!]].

Note: Holotype: photo F!

=Dubautia laxa subsp. laxa
Note: Holotype: photo F!

*Verification: None.

Dubautia laxa Hook. & Arn. f. glabrescens Sherff, Amer. J. Bot. 20: 617. 1933.
Type information:
Holotype [NY]. U. S. Expl. Exped. s.n.. 1840. O`ahu: mountains behind Honolulu. Isotype(s) [GH! US!].

Note: Holotype: photo F!

=Dubautia laxa subsp. laxa
Note: Holotype: photo F!

*Verification: None.

Dubautia laxa Hook. & Arn. subsp. bryanii (Sherff) G.D. Carr, Allertonia 4: 69. 1985. Flora of the Hawaiian Islands --Basionym
Type Information
Dubautia laxa Hook. & Arn. var. bryanii Sherff, Amer. J. Bot. 20: 617 1933.
O`ahu: Koolauloa Mts., between Punaluu and Kaipapau. 3-8 May 1909. C.N. Forbes and C.M. Cooke s.n..
Holotype [F]. Isotype(s) [BISH! [3], BM, F!, GH!, K, MO!, NY!].

Note: G. Carr (Allertonia 4: 69. 1985) erroneously published the holotype as being at BISH. Sherff clearly stated that the type was at F, and the BISH sheet annotated by Carr as the holotype has "cotype" written on the label.

=Dubautia laxa subsp. bryanii
*Verification: R.K. Shannon.
---------------------


*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. subsp. hirsuta (Hillebr.) G.D. Carr, Allertonia 4: 67. 1985. Flora of the Hawaiian Islands --Basionym
Type Information
Dubautia laxa Hook. & Arn. var. hirsuta Hillebr., Fl. Hawaiian Isl. 223 1888.
Lana`i: forested mountain slopes. W. Hillebrand s.n..
Lectotype [B]. Isolectotype(s) [GH!, K]. Lectotypified in Sherff. Bernice P. Bishop Mus. Bull. 135: 100. 1935.

Note: Holotype: photos BISH!, F! There is a sheet of the Maui collection at MEL [photo BISH].

=Dubautia laxa subsp. hirsuta
*Verification: None.
---------------------


*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. subsp. pseudoplantaginea (Skottsb.) G. D. Carr, Allertonia 4: 69. 1985. Flora of the Hawaiian Islands --Basionym
Type Information
Dubautia laxa Hook. & Arn. var. pseudoplantaginea Skottsb., Acta Horti Gothob. 2: 280 1926.
O`ahu: Nu`uanu-Kalihi Ridge. 500 to 600 m. 13 August 1922. C. Skottsberg 172.
Holotype [GB]. Isotype(s) [BISH!].

Note: Holotype: photo F!

=Dubautia laxa subsp. pseudoplantaginea
*Verification: R.K. Shannon.
---------------------


*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. var. blakei O. Deg. & Sherff, in Sherff, Bot. Gaz. (Crawfordsville) 96: 151. 1934.
Type information:
Holotype [F]. O. Degener 4234. 23 July 1927. Maui: [West Maui], ridge N of Pohakea Gulch, in windy rain forest. Isotype(s) [B! [2], BISH! [3], BM, CAS! [4], F! [3], G! [4], GH!, K, MASS!, MO!, NY! [2, mfc!], P, PH, UC].

Note: Additional isotypes: US! [2], W, WU, G-BOIS, G-DEL.

=hybrid of Dubautia laxa subsp. laxa x D. scabra subsp. leiophylla
Note: Additional isotypes: US! [2], W, WU, G-BOIS, G-DEL.

*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. var. bryanii Sherff, Amer. J. Bot. 20: 617. 1933.
Type information:
Holotype [F]. C.N. Forbes and C.M. Cooke s.n.. 3-8 May 1909. O`ahu: Koolauloa Mts., between Punaluu and Kaipapau. Isotype(s) [BISH! [3], BM, F!, GH!, K, MO!, NY!].

Note: G. Carr (Allertonia 4: 69. 1985) erroneously published the holotype as being at BISH. Sherff clearly stated that the type was at F, and the BISH sheet annotated by Carr as the holotype has "cotype" written on the label.

=Dubautia laxa subsp. bryanii
Note: G. Carr (Allertonia 4: 69. 1985) erroneously published the holotype as being at BISH. Sherff clearly stated that the type was at F, and the BISH sheet annotated by Carr as the holotype has "cotype" written on the label.

*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. var. greenwelliae O. Deg. & Sherff, in Sherff, Occas. Pap. Bernice P. Bishop Mus. 20(1): 18. 1949.
Type information:
Holotype [F]. O. Degener 19384. 6 December 1948. O`ahu: near summit of Wiliwilinui Ridge, Wailupe.610m. Isotype(s) [F 2 sheets, NY [photos B!, BISH! 3 sheets, F 2 sheets]].

Note: (coll. A. Greenwell). Holotype: photos B! BISH! 4 sheets, F!, NY!

=Dubautia laxa subsp. laxa
Note: (coll. A. Greenwell). Holotype: photos B! BISH! 4 sheets, F!, NY!

*Verification: None.

Dubautia laxa Hook. & Arn. var. hirsuta Hillebr., Fl. Hawaiian Isl. 223. 1888.
Type information:
Lectotype [B]. W. Hillebrand s.n.. Lana`i: forested mountain slopes.
Lectotypified in Sherff. Bernice P. Bishop Mus. Bull. 135: 100. 1935. Isolectotype(s) [GH!, K].

Note: Holotype: photos BISH!, F! There is a sheet of the Maui collection at MEL [photo BISH].

=Dubautia laxa subsp. hirsuta
Note: Holotype: photos BISH!, F! There is a sheet of the Maui collection at MEL [photo BISH].

*Verification: None.

Dubautia laxa Hook. & Arn. var. hispida Sherff, Amer. J. Bot. 20: 617. 1933.
Type information:
Holotype [G]. C. Gaudichaud-Beaupré 218. September-October 1836. Isotype(s) [GH!, photo of P at F!].

Note: pro parte. Holotype: photo F!

=Dubautia laxa subsp. laxa
Note: pro parte. Holotype: photo F!

*Verification: None.

Dubautia laxa Hook. & Arn. var. intercedens O. Deg., I. Deg. & Sherff, in Sherff, Occas. Pap. Bernice P. Bishop Mus. 23(7): 123. 1964.
Type information:
Holotype [F]. O. Degener and I. Degener 28392. 13 August 1963. Lana`i: near Pu`uali`i, in windy, shrubby rain forest.2750ft. Isotype(s) [B!, BISH!, G!, GH!, K!, MASS!, MO, NY [mfc!]].

Note: The BISH sheet has a long list of institutions for distribution of duplicates listed on the label.

=Dubautia laxa subsp. hirsuta
Note: The BISH sheet has a long list of institutions for distribution of duplicates listed on the label.

*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. var. obovata Sherff, Bot. Gaz. (Crawfordsville) 95: 80. 1933.
Type information:
Holotype [K]. A.A. Heller 2902. 2 November 1895. O`ahu: on or near the summit of [Pu`u] Konahuanui. Isotype(s) [BISH! [2], F, GH, MO!, US!].

Note: Collection 2902, pro parte. Sherff cited K sheet only, and added "pro parte" after collector number but did not explain why; in his monograph (1935: 97), however, he cited several other sheets of this collection under D. laxa var. laxa (F [2], G, GH, LE, NY, P [2]), excluding them from his new variety. Heller (1897:918) mentions that the "broad and narrow leaved forms being found side by side." Sherff was obviously segregating material of the two forms, naming the broad leaved one as D. laxa var. obovata. Sherff did not cite a date in the original publication, but cited 2 November in his monograph.

=Dubautia laxa subsp. laxa
Note: Collection 2902, pro parte. Sherff cited K sheet only, and added "pro parte" after collector number but did not explain why; in his monograph (1935: 97), however, he cited several other sheets of this collection under D. laxa var. laxa (F [2], G, GH, LE, NY, P [2]), excluding them from his new variety. Heller (1897:918) mentions that the "broad and narrow leaved forms being found side by side." Sherff was obviously segregating material of the two forms, naming the broad leaved one as D. laxa var. obovata. Sherff did not cite a date in the original publication, but cited 2 November in his monograph.

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

Dubautia laxa Hook. & Arn. var. pedicellata Rock, Indig. trees Haw. Isl. 501. 1913.
Type information:
Lectotype [BISH]. J. F. Rock 8850. 21 October 1911. Kaua`i: on ridge leading to Wai`ale`ale.
Lectotypified in G. Carr. Allertonia 4: 67. 1985. Isolectotype(s) [BM, F!, GH! 2 SHEETS [photo F!], K, UC, US!].

Note: How/why did Carr pick this collection for lectotype? What are syntypes? What about Sherff's treatment (Bernice P. Bish. Mus. Bull. 135: 100. 1935)? (WLW, 1/95)

=Dubautia laxa subsp. hirsuta
Note: How/why did Carr pick this collection for lectotype? What are syntypes? What about Sherff's treatment (Bernice P. Bish. Mus. Bull. 135: 100. 1935)? (WLW, 1/95)

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

Dubautia laxa Hook. & Arn. var. pseudoplantaginea Skottsb., Acta Horti Gothob. 2: 280. 1926.
Type information:
Holotype [GB]. C. Skottsberg 172. 13 August 1922. O`ahu: Nu`uanu-Kalihi Ridge.500 to 600m. Isotype(s) [BISH!].

Note: Holotype: photo F!

=Dubautia laxa subsp. pseudoplantaginea
Note: Holotype: photo F!

*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. var. skottsbergii Sherff, Field Mus. Nat. Hist. Bot. Ser. 17: 611. 1939.
Type information:
Holotype [BISH]. L.M. Cranwell , O.H. Selling and C. Skottsberg 2976. 16 August 1938. Kaua`i: Alaka`i, trail to Kilohana near beginning of the open bog, between Lehuamakanoi and main bog.

Note: Holotype incorrectly stated as being at GB by Sherff.

=Dubautia laxa subsp. hirsuta
Note: Holotype incorrectly stated as being at GB by Sherff.

*Verification: R.K. Shannon.

Dubautia laxa Hook. & Arn. var. waianensis O. Deg. & Sherff, in Sherff, Bot. Gaz. (Crawfordsville) 96: 151. 1934.
Type information:
Holotype [F]. O. Degener 4340. 1929. O`ahu: [Wai`anae Mts.], Mt. Ka`ala, in moderately wet locality.2500ft. Isotype(s) [BISH! [frag], NY [mfc!, photos B!, F!]].
=Dubautia laxa subsp. hirsuta

*Verification: R.K. Shannon.