Astragalus sect. Hymenostegis

Firat, Mehmet, 2024, Astragalus miksensis Fırat (Fabaceae), a new species in section Hymenostegis from Van province, Türkiye, Phytotaxa 641 (2), pp. 149-160 : 159

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