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Cutleaf Coneflower, Green-Head Coneflower, Green Headed Coneflower, Tall Coneflower, Wild Goldenglow is a herbaceous perennial that grows 3 to 10 feet tall with a tall and lanky appearance, although it may only reach half that height when cultivated.Up to six varieties of Rudbeckia laciniata are currently recognized. The varieties ampla and heterophylla are considered to be the most distinctive, while the others less so. There is variation in treatment among authors, with the less distinctive varieties sometimes being subsumed into laciniata, and variety ampla sometimes recognized at the species level.
Rudbeckia laciniata has long been cultivated as an ornamental plant and came to Paris in the private garden of Vespasias Robin at the beginning of the 17th century. Caspar Bauhin also received this ornamental plant from Robin in 1622 , who described it as 'Doronicum americanum laciniato folio'. The first garden in Germany in which it is recorded is Altdorf 1646. The double-flowered form, which is mainly cultivated, has been known since around 1894. The first naturalizations on river banks in Central Europe were observed in the 18th century. Anton Johann Krocker reported about it in 1787 in Queistal near Flinsburg in eastern Upper Lusatia. As an ornamental plant, varieties are used in parks and gardens in temperate areas, for example also filled forms. In Europe, Rudbeckia laciniata became wild in various countries. Besides Europe, Rudbeckia laciniata is a neophyte in China and New Zealand.
Gerhard Wagenitz: Rudbeckia laciniata. In: Gerhard Wagenitz (Hrsg.): Illustrated flora of Central Europe. Pteridophyta, Spermatophyta. Founded by Gustav Hegi. 2nd, completely revised edition. Volume VI. Part 3: Angiospermae, Dicotyledones 4 (Compositae 1, General Part, Eupatorium - Achillea) . Paul Parey, Berlin / Hamburg 1979, ISBN 3-489-84020-8 , pp. 242–244 (published in deliveries 1964–1979).Rudbeckia laciniata (Cutleaf Coneflower) is a rhizomatous perennial boasting bright yellow flowers in mid summer to mid fall. Very tall, this late flowering Coneflower features large daisy blossoms, 3-4 in. across (7-10 cm), with broad, drooping, glowing golden petals surrounding a prominent pale green conical center that turns brown as it matures. Attractive to butterflies and pollinating insects, the blossoms rise atop wiry stems above the deeply-divided foliage of light green leaves. Its attractive seedheads further extend its season of interest and will be visited in the fall and winter by birds that will feast on them. Cutleaf Coneflower spreads rampantly by underground rhizomes and is only appropriate for large landscapes.