Forsythia Vahl

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 53

3. Forsythia Vahl 1

Deciduous shrubs. Leaves opposite, entire or serrate, simple (in most species). Inflorescences axillary. Flowers yellow, heterostylous, appearing before or with the leaves. Calyx and corolla 4-lobed. Ovary with several ovules. Fruit a capsule.

Literature: A. Lingelsheim in Engler, Pflanzenreich 72 (IV. 243): 109-113 (1920). F. Markgraf, M itt. Deutsch. Dendrol. Ges. 42: 1-12(1930).