| Acanthaceae | |
Siphonoglossa bartlettii
| Standl. | | |
| Acanthaceae | |
Siphonoglossa buchii
| (Urb.) Hilsenb. | Brittonia 31(3): 378 | 1979 |
| Acanthaceae | |
Siphonoglossa calcarea
| Leonard | Contr. U.S. Natl. Herb. 31(3): 402, f. 149 | 1958 |
| Acanthaceae | |
Siphonoglossa canbyi
| (Greenm.) Hilsenb. | Brittonia 31(3): 377 | 1979 |
| Acanthaceae | |
Siphonoglossa dipteracantha
| (Nees) A. Heller | Contr. Herb. Franklin Marshall Coll. 1: 95 | 1895 |
| Acanthaceae | |
Siphonoglossa discolor
| S.F. Blake | Contr. U.S. Natl. Herb. 24(1): 24 | 1922 |
| Acanthaceae | |
Siphonoglossa durangensis
| Henrickson & Hilsenb. | Brittonia 31(3): 375 | 1979 |
| Acanthaceae | |
Siphonoglossa gentianifolia
| Lindau | Bull. Herb. Boissier, sér. 2, 5(4): 370 | 1905 |
| Acanthaceae | |
Siphonoglossa glabrescens
| Lindau | Bull. Herb. Boissier 2(8): 564–565 | 1894 |
| Acanthaceae | |
Siphonoglossa greggii
| Greenm. & C.H. Thomps. | Ann. Missouri Bot. Gard. 1(4): 409–410 | 1914 [1915] |
| Acanthaceae | |
Siphonoglossa hondurensis
| Standl. & Steyerm. | Ceiba 3(2): 131 | 1952-1953 [1952] |
| Acanthaceae | |
Siphonoglossa incerta
| (Brandegee) Hilsenb. | Brittonia 37(3): 378 | 1979 |
| Acanthaceae | |
Siphonoglossa leptantha
| (Nees) Immelman | Bothalia 19(2): 209 | 1989 |
| Acanthaceae | |
Siphonoglossa linearifolia
| Henrickson & Hilsenb. | Brittonia 31(3): 374, f. 1H–L | 1979 |
| Acanthaceae | |
Siphonoglossa linifolia
| C.B. Clarke | | |
| Acanthaceae | |
Siphonoglossa longiflora
| (Torr.) A. Gray | Syn. Fl. N. Amer. 2(1): 328 | 1878 |
| Acanthaceae | |
Siphonoglossa macleodiae
| S. Moore | Chiefs & Cities Centr. Afr. 304 | 1912 |
| Acanthaceae | |
Siphonoglossa mexicana
| Hilsenb. | Madroño 36(3): 198–203, f. 1 | 1989 |
| Acanthaceae | |
Siphonoglossa migeodii
| S. Moore | J. Bot. 67: 271 | 1929 |
| Acanthaceae | |
Siphonoglossa nkandlaensis
| Immelman | | |
| Acanthaceae | |
Siphonoglossa nummularia
| S. Moore | | |
| Acanthaceae | |
Siphonoglossa peruviana
| Lindau | Bot. Jahrb. Syst. 42: 173 | 1908 |
| Acanthaceae | |
Siphonoglossa pilosella
| (Nees) Torr. | Rep. U.S. Mex. Bound. 2(1): 124 | 1859 |
| Acanthaceae | |
Siphonoglossa pringlei
| (B.L. Rob. & Greenm.) Lindau | Bull. Herb. Boissier 5(8): 662 | 1897 |
| Acanthaceae | |
Siphonoglossa ramosa
| Oerst. | Vidensk. Meddel. Dansk Naturhist. Foren. Kjøbenhavn 1854(8–12): 160 | 1855 |
| Acanthaceae | |
Siphonoglossa saligna
| Standl. | | |
| Acanthaceae | |
Siphonoglossa sessilis
| (Jacq.) D.N. Gibson | Fieldiana, Bot. 34(6): 82 | 1972 |
| Acanthaceae | |
Siphonoglossa sulcata
| (Nees) Lindau | Bot. Jahrb. Syst. 19(Beibl.48): 19 | 1894 |
| Acanthaceae | |
Siphonoglossa tubulosa
| Benth. ex Lindau | | |