| Habit | 4–17(–20) cm tall | 4–6 cm tall | 4-6 cm tall | - |
|---|---|---|---|---|
| Stems of the current year | up to 4 cm long | up to 2 cm long | up to 2 cm long | - |
| Leaflet’s pairs | 3–5 pairs | 3–4 pairs | 3-4 pairs | 3 pairs |
| Leaflets dimension | 4–14 × 2–6 mm | 4-10 × 2-4 mm | 2-10 × 1.5-4 mm | 4-6 mm |
| No. of flowers in raceme | 1–3 | 1–2 | 1-3 | 1 |
| Peduncle length | up to 7.0 cm | up to 1.5 cm | 1.5-3 cm | very short |
| Bracts length | 1.5–3.0 mm | 1.5–2 mm | 1.5-2 mm | - |
| Pedicels length | 1.0–3.5 mm | 1–2 mm | 1-2 mm | - |
| Calyx length | 10.0–18.5 mm | 10–12 mm | 10-12 mm | - |
| Calyx teeth length | 1–4 mm | c. 2 mm | 2 mm | - |
| Petals color | purple & white | - | violet-pale violet | - |
| Standard dimension | 24–33 × 9.5–13.0 mm | - | - | Petals: 16-18 mm |
| Wings length | 23–28 mm | - | - | - |
| Wing’s blade dimension | 9.0–10.5 × 2.5–3.5 mm | - | - | - |
| Wing’s claw length | 14–18 mm | - | - | - |
| Keel length | 20.5–25.0 mm | - | 16 mm | - |
| Keel’s blade dimension | 6.5–8.0 × 3–4 mm | - | - | - |
| Keel’s claw length | 14–17 mm | - | - | - |
| Stamen-tube length | 16–22 mm | - | - | - |
| Ovary’s stipe length | c. 1 mm | - | - | - |
| Ovary length | 5.5–7.5 mm | - | - | - |
| Style length | 14.5–18.0 mm | - | - | - |
| Legume | 18–35 × 10–20 × 12–28 mm | 18-25 × 10-13 × 12-15 mm | 15-25 × 8-13 × 12-15 mm | Immature: 12-14 mm |
| Hairs color of legume | white (rarely together with short black hairs) | white | white | white |
| Seeds size | 2.5–2.8 × 2.8–3.2 mm | - | - | - |