Isatis frigida Boiss. & Kotschy in Boiss., Diagn. Pl. Orient. ser. 2, 5: 47. 1856.

Type: “Hab. in declivibus cacuminis Metdesis Tauri Cilicici suprâ fodinas plumbeas Gülek alt. 9000' cl. Kotschy”.

Holotypus: TURKEY: “in Tauri alpes ‘Bulgar-Dagh.’ Ad devexa summi cacuminis Metdesis supra plumbi fodinas pagi Güllek”, 9000' [2740 m], 30.VII.1853, Kotschy 156 112 222 (G-BOIS [G00332605]; iso-: E [E00257786], G [G00446278], GOET [GOET002620], K [K000642864, K000642865], KW [KW000127955], P [P00741443, P00741444, P00741445, P00741446, P00741447, P00741448, P00741449], S [S0912386, S0912398], W [W0075583, W0075584, W0075585], WAG [WAG0004253, WAG0004254]) .

Notes. – Labels of the type collection have one to three collection numbers, but all the other data are identical, and it appears that different collection numbers were given by Kotschy with the thought that they represent different things. However, all labels carry the name I. suffrutescens Boiss., a nomen nudum listed in the synonymy in the original publication and in Flora Orientalis.

The label of P00741446 in Cosson’s herbarium is handwritten, and it reads “ Isatis suffrutescens, Boiss. Kotschy, iter cilic. no. 156”. However, plants with the numbers 156, 112, and 222 were mounted on a single sheet with barcodes P00741443, P00741444, and P00741445, respectively, though carrying the same information as that of the holotype. Therefore, such collection numbers have no value for this species.

The holotype is a collection folder of two sheets, the printed label of one of which indicate “Plantae Tauri Cilicici. Th. Kotschy. 1853”.