The genus Symphytum L. (Comfrey) in the Czech Republic III. Introduced and cultivated species

The last part of a revision of the genus Symphytum in the Czech Republic treat naturalized and cultivated species. Two naturalized taxa are traditionally recognized in the Czech flora, namely Symphytum asperum and S. ×uplandicum. In addition, the occurrence of three other alien species is discussed: S. tauricum, a Crimean species discovered in south-west Bohemia, S. grandiflorum, a Caucasian species found in Prague, and S. ×hidcotense, an artificial hybrid taxon discovered in the vicinity of the town of Ivančice, Moravia. Symphytum grandiflorum and S. ×hidcotense are reported from the Czech Republic for the first time.

A detailed morphological description, ecology, distribution of these taxa and the history of their cultivation
in our country are presented. In addition, several species cultivated in Central Europe (S. bulbosum, S. caucasicum, S. cordatum and S. orientale) are discussed.