Isatis latisiliqua var. gudrunensis Boiss., Fl.

AL-Shehbaz, Ihsan A. & Barriera, Gabrielle, 2019, Typification of Edmond Boissier’s Cruciferae (Brassicaceae) names enumerated in Flora Orientalis, Boissiera 72, pp. 1-193 : 158

Isatis latisiliqua var. gudrunensis Boiss., Fl. Orient. Suppl.: 64. 1888.

Type: “Hab. in rupestribus calcareis montis Pir Omar Gudrun Kurdistaniae 3–7000' (Haussk.!)”.

Holotypus: IRAQ: “Pir Omar Gudrun”, 3000'–6000' [9 1 0 – 1 8 3 0 m], V I. 1 8 6 7, H a u s s k n e c h t s.n. ( G-BOIS [ G00332592 ]; iso-: BM [ BM001254136 ], K [ K000642855 ], JE [ JE00001296 ], P [ P05384183 ]) .

= Isatis cappadocica subsp. subradiata (Rupr.) Davis in Notes Roy. Bot. Gard. Edinburgh 26: 18. 1965.

Notes. – The above duplicates at K and P were collected at an elevation of 4–7000 ft, instead of 3–6000 ft as in the other duplicates, and may well belong here.

This taxon was treated by DAVIS (1964, 1965b) as I. cappadocica subsp. subradiata var. gudrunensis (Boiss.) Davis and by HEDGE (1968: 81–82) as a synonym of I. cappadococica subsp. stenophylla (Bornm. & Gauba) Hedge & Lamond. The differences between these two subspecies are tenuous at best and rest exclusively on the length/width ratio of the fruit.

Plants of the type collection of var. gudrunensis do not have mature fruit, and they are only reluctantly assigned here to the earlier published subsp. subradiata .