Anotis longifolia
| Anotis longifolia (Gaertner) G. Don, Gen. Hist. 3: 535. 1834. | Houstonia longifolia Gaertner 1788. | |
Chamisme longifolia
| Chamisme longifolia (Gaertner) Nieuwland, Amer. Midl. Naturalist 4: 92. 1915. | Houstonia longifolia Gaertner 1788. | |
Chamisme tenuifolia
| Chamisme tenuifolia (Nuttall) Nieuwland, Amer. Midl. Naturalist 4: 92. 1915. | Houstonia tenuifolia Nuttall 1818. | |
Hedyotis longifolia var. compacta
| Hedyotis longifolia (Gaertner) Hooker, var. compacta (Terrell) W. H. Lewis, Amer. J. Bot. 49: 865. 1962. | Houstonia longifolia Gaertner, var. compacta Terrell 1959. | |
Hedyotis longifolia var. glabra
| Hedyotis longifolia (Gaertner) Hooker, var. glabra (Terrell) W. H. Lewis, Amer. J. Bot. 49: 865. 1962. | Houstonia longifolia Gaertner, var. glabra Terrell 1959. | |
Hedyotis longifolia var. tenuifolia
| Hedyotis longifolia (Gaertner) Hooker, var. tenuifolia (Nuttall) Torrey & A. Gray, Fl. N. Amer. 2: 40. 1841. | Houstonia tenuifolia Nuttall 1818. | NORTH CAROLINA: |
Hedyotis nuttalliana
| Hedyotis nuttalliana Fosberg, Virginia J. Sci. 2: 111. 1941. | Houstonia tenuifolia Nuttall 1818. | |
Hedyotis purpurea var. longifolia
| Hedyotis purpurea (Linnaeus) Torrey & A. Gray, var. longifolia (Gaertner) Fosberg, Castanea 19: 34. 1954. | Houstonia longifolia Gaertner 1788. | |
Hedyotis purpurea var. tenuifolia
| Hedyotis purpurea (Linnaeus) Torrey & A. Gray, var. tenuifolia (Nuttall) Fosberg, Castanea 19: 35. 1954. | Houstonia tenuifolia Nuttall 1818. | |
Houstonia longifolia var. compacta
| Houstonia longifolia Gaertner, var. compacta Terrell, Rhodora 61: 202. 1959. | | WEST VIRGINIA: Cabell Co.: Roland Park, 9 Jul 1937, Jun 1939, Gilbert s.n. (holotype; GH; isotypes: ARIZ, CAS, CU, DUKE, F, GH, IA, ISC, LL, MICH, MO, MT, NCSC, NCU, NO, NY, OKL, OKLA, PAC, PH, TENN, TEX, TRT, UC, US, USF, WIS). |
Houstonia longifolia var. glabra
| Houstonia longifolia Gaertner, var. glabra Terrell, Rhodora 61: 204. 1959. | | NORTH CAROLINA: Jackson Co.: Summit of Whitesides Mountain, ca. 5. mi. NE of Highlands, 1 Jul 1956, Terrell 3095 (holotype: GH). |
Houstonia longifolia var. musci
| Houstonia longifolia Gaertner, var. musci B. Boivin, Phytologia 16: 29. 1968. | | CANADA: Alberta: Vegreville Distr., 2 mi. N of Bruderheim, 18 Aug 1952, Boivin et al. 10176 (holotype: DAO; isotypes: GH, MT, NY). |
Houstonia longifolia var. soperi
| Houstonia longifolia Gaertner, var. soperi B. Boivin, Phytologia 16: 30. 1968. | | CANADA: Ontario: Turkey Point, 4 Jul 1938, Soper 588 (holotype: DAO). |
Houstonia longifolia var. tenuifolia
| Houstonia longifolia Gaertner, var. tenuifolia (Nuttall) A. W. Wood, Class-Book Bot., ed. 1861. 403. 1861. | Houstonia tenuifolia Nuttall 1818. | |
Houstonia purpurea var. longifolia
| Houstonia purpurea Linnaeus, var. longifolia (Gaertner) A. Gray, Manual, ed. 5. 212. 1867. | Houstonia longifolia Gaertner 1788. | |
Houstonia purpurea var. tenuifolia
| Houstonia purpurea Linnaeus, var. tenuifolia (Nuttall) A. Gray, Syn. Fl. N. Amer. 1(2): 26. 1884. | Houstonia tenuifolia Nuttall 1818. | |
Houstonia tenuifolia
| Houstonia tenuifolia Nuttall, Gen. N. Amer. Pl. 1: 95. 1818. | | TENNESSEE: "near the confluence of Pidgeion river, and the French Broad", |
Oldenlandia purpurea var. longifolia
| Oldenlandia purpurea (Linnaeus) A. Gray, var. longifolia (Gaertner) A. Gray, Manual, ed. 2. 173. 1856. | Houstonia longifolia Gaertner 1788. | |
Oldenlandia purpurea var. tenuifolia
| Oldenlandia purpurea (Linnaeus) A. Gray, var. tenuifolia (Nuttall) A. Gray ex Chapman, Fl. South. U.S. 181. 1860. | Houstonia tenuifolia Nuttall 1818. | |
Hedyotis longifolia
| Hedyotis longifolia (Gaertner) Hooker, Fl. Bor.-Amer. 1: 286. 1833. | Houstonia longifolia Gaertner 1788. | |