Astragalus nurhakdagensis (sect. Hololeuce Bunge / Fabaceae), a new species from Turkey

Astragalus nurhakdagensis, a new species from the south of Turkey was described, illustrated, and compared to the closest taxa Astragalus hirsutus, A. dumanii and A. cataonicus from which it is set apart by a longer calyx length (13–14 mm) and calyx teeth (7–9 mm, longer than tube), white corolla colour, longer bracts (13–15 mm) and black hairy stripes below the stem nodes. In A. hirsutus, the calyx length (6–10 mm) and calyx teeth are much smaller (2–3 mm long, shorter than tube), with yellow corolla colour and without black hairy stripes. It also differs from A. dumanii with its longer stipules 9–13 mm (not 5–8 mm), bracts 13–15 mm (not 4–6 mm), calyx length 13–14 mm (not 7–10 mm) and calyx teeth 7–9 mm (not 2–4 mm), and also with spreading hairs (not adpressed) on the calyx and 7–9 pairs of leaflets (not 3–7 pairs).