Rudbeckia laciniata, L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1976, Flora Europaea. Volume 4. Plantaginaceae to Compositae (and Rubiaceae), Cambridge University Press : 141

2. R. laciniata L. , Sp.Pl. 906 (1753).

Glaucous perennial up to 300 cm. Stem and upper surface of leaves glabrous or nearly so. Lower leaves 2-pinnatifid, petiolate; middle leaves deeply 2- to 3-lobed, the lobes more or less pinnatifid; upper leaves simple, ovate, sessile; all entire or coarsely toothed. Capitula long- pedunculate. Involucral bracts ovate-oblong, with deflexed apex. Ligules 3-6 cm, yellow, soon deflexed. Inner florets yellow-green. Pappus a short, usually toothed corona. 2« = 76. Cultivated for ornament and naturalized on river-banks, mainly in C. Europe. [Au Be Br Cz Ga Ge He Ho Hu It Ju Po Rm Rs (W).] (North America.)