Revised diagnostic key for Astragalus sect. Hymenostegis in Türkiye (based on Karaman Erkul et al. 2016) 1. Petals yellow or dirty cream to pale yellow ....................................................................................................................................... 2 2. Racemes bicolored, pink or mauve (distal part of raceme), dirty cream to pale yellow (basal part of raceme) ............. A. miksensis 2. Racemes unicolored, yellow............................................................................................................................................................... 3 3. Stipules hairy ...................................................................................................................................................................................... 4 4. Stipules 13–17 mm; leaves (1.5–) 3–8 cm; peduncles 1–4 cm .................................................................................... A. velenovskyi 4. Stipules 30–35 mm; leaves 9–20 cm; peduncles 24–28 cm ........................................................................................ A. narmanicus 3. Stipules glabrous or ciliate ................................................................................................................................................................. 5 5. Peduncle hairs ascending-spreading................................................................................................................................................... 6 6. Bracts deciduous; rachis hairs adpressed to subadpressed with some sparsely ascending hairs............................... A. gueruenensis 6. Bracts persistent; rachis ascending-spreading hairy...................................................................................................... A. sosnowskyi 5. Peduncle hairs adpressed to subadpressed .................................................................................................................... A. lagopoides 1. Petals pink-purple or red-purple......................................................................................................................................................... 6 6. Inflorescence lax.................................................................................................................................................................................7 7. Racemes ovoid.................................................................................................................................................................................... 8 8. Peduncle mostly longer than the leaves............................................................................................................................... A. zohrabi 8. Peduncle shorter than the leaves...................................................................................................................................... A. miksensis 7. Racemes cylindrical............................................................................................................................................................................ 9 9. Peduncle with adpressed to subadpressed hairs ........................................................................................................ A. rubrostriatus 9. Peduncle with crisped white hairs ................................................................................................................................ A. nordizensis 6. Inflorescence dense .......................................................................................................................................................................... 10 10. Rachis hairs adpressed to subadpressed with some sparsely ascending hairs.................................................................................. 11 11. Standard angular-hastate.......................................................................................................................................... A. uraniolimneus 11. Standard not angular-hastate ............................................................................................................................................................ 12 12. Standard glabrous .............................................................................................................................................................. A. ciloensis 12. Standard hairy................................................................................................................................................................. A. qoturensis 10. Rachis hairs ascending-spreading..................................................................................................................................................... 13 13. Stipules hyaline-membranous; peduncle longer than the leaves or equal........................................................................................ 14 14. Stipules with dense, netlike nerves in the lower part; legume 7–9 mm long .......................................................... A. uraniolimneus 14. Stipules without dense, netlike nerves in the lower part; legume 4–6 mm long....................................................... A. hymenocystis 13. Stipule papery; peduncle shorter than the leaves ............................................................................................................ A. hirticalyx 15. Leaflets 1–3 pairs, upper side glabrous, lower side sparsely hairy; stipules hairy..................................................... A. trifoliastrum 15. Leaflets 4–6 pairs, both sides dense hairy; stipulse glabrous........................................................................................ A. lagopoides

Published as part of Firat, Mehmet, 2024, Astragalus miksensis Fırat (Fabaceae), a new species in section Hymenostegis from Van province, Türkiye, pp. 149-160 in Phytotaxa 641 (2) on page 159, DOI: 10.11646/phytotaxa.641.2.6, http://zenodo.org/record/13213876