| Ericaceae | |
Azalea alabamensis
| (Rehder) Ashe | J. Elisha Mitchell Sci. Soc. 38: 90 | 1922 |
| Ericaceae | |
Azalea albiflora
| (Hook.) Kuntze | Revis. Gen. Pl. 2: 387 | 1891 |
| Ericaceae | |
Azalea arborescens
| Pursh | Fl. Amer. Sept. 1: 152–153 | 1814 [1813] |
| Ericaceae | |
Azalea atlantica
| Ashe | Bull. Charleston Mus. 13(4): 26–27 | 1917 |
| Ericaceae | |
Azalea austrina
| Small | Fl. S.E. U.S. (ed. 2) 1356, 1375 | 1913 |
| Ericaceae | |
Azalea calendulacea
| Michx. | Fl. Bor.-Amer. 1: 151 | 1803 |
| Ericaceae | |
Azalea californica
| Torr. & A. Gray ex Durand | Pl. Pratten. Calif. 94 | 1855 |
| Ericaceae | * |
Azalea californica
| (Hook.) Kuntze | Revis. Gen. Pl. 2: 387 | 1891 |
| Ericaceae | |
Azalea candida
| Small | Bull. Torrey Bot. Club 28(6): 360 | 1901 |
| Ericaceae | |
Azalea canescens
| Michx. | Fl. Bor.-Amer. 1: 150 | 1803 |
| Ericaceae | |
Azalea chapmanii
| (Alph. Wood) Kuntze | Revis. Gen. Pl. 2: 387 | 1891 |
| Ericaceae | |
Azalea cumberlandensis
| (E.L. Braun) H.F. Copel. | Amer. Midl. Naturalist 30(3): 595 | 1943 |
| Ericaceae | |
Azalea farrerae
| (Sweet) K. Koch | Dendrologie 2(1): 178 | 1872 |
| Ericaceae | |
Azalea ferruginosa
| Pall. | Fl. Ross. 2: pl. 70 f. 1A. B. | 1788 |
| Ericaceae | |
Azalea fragrans
| Generic Adams | Mus. Bot. 2: 332 | 1808 |
| Ericaceae | |
Azalea glauca
| Meerb. | Pl. Select. Icon. Pict. , t. 6 | 1798 |
| Ericaceae | |
Azalea glauca
| Lam. | Encycl. 1: 340 | 1783 |
| Ericaceae | |
Azalea glauca
| Kuntze | Revis. Gen. Pl. 2: 387 | 1891 |
| Ericaceae | |
Azalea hispida
| Pursh | Fl. Amer. Sept. 1: 154 | 1813 |
| Ericaceae | |
Azalea indica
| L. | Sp. Pl. 1: 150 | 1753 |
| Ericaceae | |
Azalea japonica
| A. Gray | Mem. Amer. Acad. Arts, n.s. 6(2): 400 | 1858 |
| Ericaceae | |
Azalea lapponica
| L. | Sp. Pl. 1: 151 | 1753 |
| Ericaceae | |
Azalea lucida
| Meerb. | Pl. Select. Icon. Pict. , t. 7 | 1798 |
| Ericaceae | |
Azalea lucida
| Kuntze | Revis. Gen. Pl. 2: 387 | 1891 |
| Ericaceae | |
Azalea macrantha
| Bunge | Mém. Acad. Imp. Sci. St.-Pétersbourg Divers Savans 2: 115 | 1833 |
| Ericaceae | ! |
Azalea mollis
| Blume | Catalogus 44 | 1823 |
| Ericaceae | ! |
Azalea mucronata
| Blume | Catalogus 44 | 1823 |
| Ericaceae | |
Azalea myrtifolia
| Champ. | Bot. Mag. 77: , sub pl. 4609 | 1851 |
| Ericaceae | |
Azalea neglecta
| Ashe | Bull. Torrey Bot. Club 47: 581 | 1920 |
| Ericaceae | |
Azalea nitida
| Pursh | Fl. Amer. Sept. 1: 153 | 1814 [1813] |
| Ericaceae | |
Azalea nudiflora
| L. | Sp. Pl. (ed. 2) 1: 214 | 1762 |
| Ericaceae | |
Azalea oblongifolia
| Small | Fl. S.E. U.S. 883, 1336 | 1903 |
| Ericaceae | |
Azalea obtusa
| Lindl. | J. Hort. Soc. London 1: 152 | 1846 |
| Ericaceae | |
Azalea occidentalis
| Torr. & A. Gray | Pacif. Railr. Rep. 4(5): 116 | 1857 |
| Ericaceae | |
Azalea oldhamii
| (Maxim.) Mast. | Gard. Chron., n.s. 17: 524 | 1882 |
| Ericaceae | |
Azalea ovata
| Lindl. | J. Hort. Soc. London 1: 149 | 1846 |
| Ericaceae | |
Azalea parvifolia
| (Adams) Kuntze | Revis. Gen. Pl. 2: 387 | 1891 |
| Ericaceae | |
Azalea periclymenoides
| Michx. | Fl. Bor.-Amer. 1: 151 | 1803 |
| Ericaceae | |
Azalea pilosa
| Michx. | J. Hist. Nat. 1: 410 | 1792 |
| Ericaceae | |
Azalea pontica
| L. | Sp. Pl. 1: 150 | 1753 |
| Ericaceae | |
Azalea prinophylla
| Small | N. Amer. Fl. 29(1): 42 | 1914 |
| Ericaceae | |
Azalea procumbens
| L. | Sp. Pl. 1: 151 | 1753 |
| Ericaceae | |
Azalea prunifolia
| Small | Fl. S.E. U.S. (ed. 2) 1356–1357, 1375 | 1913 |
| Ericaceae | |
Azalea quinquefolia
| (Bisset & S. Moore) Olmsted, Coville & Kelsey | Stand. Pl. Names 27 | 1923 |
| Ericaceae | |
Azalea rosea
| Loisel. | Traité Arbr. Arbust. 5: 224, pl. 64 | 1812 |
| Ericaceae | |
Azalea rosmarinifolia
| Burm. f. | Fl. Indica 43, pl. 3, f. 3 | 1768 |
| Ericaceae | |
Azalea rubra
| Meerb. | Pl. Select. Icon. Pict. , t. 8 | 1798 |
| Ericaceae | |
Azalea schlippenbachii
| (Maxim.) Kuntze | Revis. Gen. Pl. 2: 387 | 1891 |
| Ericaceae | |
Azalea serrulata
| Small | Fl. S.E. U.S. 883, 1336 | 1903 |
| Ericaceae | |
Azalea sinensis
| Lodd. | Bot. Cab. 9: , pl. 885 | 1824 |
| Ericaceae | |
Azalea speciosa
| Willd. | Enum. Pl. 10 | 1809 |
| Ericaceae | |
Azalea squamata
| Lindl. | J. Hort. Soc. London 1: 152 | 1846 |
| Ericaceae | |
Azalea vaseyi
| (A. Gray) Rehder | Möller's Deutsche Gärtn.-Zeitung 14(29): 332 | 1899 |
| Ericaceae | ** |
Azalea verticillata
| W. Bartram ex G. Lodd. | Bot. Cab. 17: t. 1632 | 1830 |
| Ericaceae | |
Azalea virens
| (Michx.) Dum. Cours. | Bot. Cult. ed. 2, 3: 335 | 1811 |
| Ericaceae | |
Azalea viscosa
| L. | Sp. Pl. 1: 151 | 1753 |