| Oleaceae | |
Forsythia densiflora
| | | |
| Oleaceae | * |
Forsythia densiflora
| Nakai | Bot. Mag. (Tokyo) 44: 28 | 1930 |
| Oleaceae | |
Forsythia × densiflora
| (Koehne) Koehne | Gartenflora 55: 229 | 1906 |
| Oleaceae | |
Forsythia europaea
| Degen & Bald. | Oesterr. Bot. Z. 47: 406 | 1898 |
| Oleaceae | |
Forsythia fortunei
| Lindl. | Gard. Chron. 1864: 412 | 1864 |
| Oleaceae | |
Forsythia giraldiana
| Lingelsh. | Jahresber. Schles. Ges. Vaterl. Cult. 86: 1 | 1908 |
| Oleaceae | |
Forsythia × intermedia
| Zabel | Gartenflora 34(2): 35–36, pl. 1182, f. 2–4 | 1885 |
| Oleaceae | |
Forsythia japonica
| Makino | Bot. Mag. (Tokyo) 28: 105 | 1914 |
| Oleaceae | |
Forsythia koreana
| Nakai | | |
| Oleaceae | |
Forsythia likiangensis
| Ching & Feng ex P. Y. Bai | Acta Bot. Yunnan. 5(2): 178–179, pl. 2 | 1983 |
| Oleaceae | |
Forsythia mala-elengi
| Dennst. | Schlüssel Hortus Malab. 31 | 1818 |
| Oleaceae | |
Forsythia × mandschurica
| Uyeki | J. Chosen Nat. Hist. Soc. 9: 20 | 1929 |
| Oleaceae | |
Forsythia mandschurica
| Uyeki | J. Chosen Nat. Hist. Soc. 9: 21 | 1929 |
| Oleaceae | |
Forsythia mira
| M.C. Chang | Invest. Stud. Nat. 7: 16 | 1987 |
| Oleaceae | |
Forsythia nakaii
| (Uyeki) T.Lee | Ill. Woody Pl. Korea 330 | 1966 |
| Oleaceae | |
Forsythia ovata
| Nakai | | |
| Oleaceae | |
Forsythia pilosa
| U.C.La & C.G. Chen | J. Kim Il Sung Univ., Nat. Sci. 37(4): 78 | 1991 |
| Oleaceae | |
Forsythia saxatilis
| (Nakai) Nakai | Fl. Sylv. Kor. 10: 21 | 1921 |
| Oleaceae | |
Forsythia saxatilis
| | | |
| Oleaceae | |
Forsythia sieboldii
| (Zabel) Dippel | Handb. Laubholzk. 1: 109 | 1889 |
| Oleaceae | |
Forsythia × spectabilis
| Koehne | Gartenflora 55: 227 | 1906 |
| Oleaceae | |
Forsythia suspensa
| (Thunb.) Vahl | Enum. Pl. 1: 39 | 1804 |
| Oleaceae | |
Forsythia togashii
| H. Hara | J. Jap. Bot. 48: 256 | 1973 |
| Oleaceae | |
Forsythia velutina
| Nakai | Iconogr. Pl. Asiae Orient. 4: 385 | 1942 |
| Oleaceae | |
Forsythia viridissima
| Lindl. | J. Hort. Soc. London 1: 226–228 | 1846 |
| Oleaceae | |
Forsythia × vitellina
| (Koehne) Koehne | Gartenflora 55: 226 | 1906 |