| 1 | Flowers in many-flowered verticillasters, congested into globoid or ellipsoid spurious heads (or dense spikes). |
| 1' | Flowers in few-flowered short cymes, axillary or in terminal spurious racemes or panicles. |
| 2 | Spurious heads axillary, globose or subglobose. |
| 2' | Spurious heads (or dense spikes) terminal, oblong or ellipsoid, (in fr.) 3-5 cm long. |
| 3 | Spurious heads 0.8-1.2 cm (in fr.) Ø. Peduncles 0.5-1 cm long |
| 3' | Spurious heads 1.5-2 cm (in fr.) 0. Peduncles 3-5(-8) cm long |
| 4 | Cymes 6-15-flowered, comb-shaped, in terminal spurious racemes or panicles. Calyx tubular, 3-4 mm long in fruit |
| 4' | Cymes 2-5-flowered, clustered in leaf-axils or racemosely disposed. Calyx obliquely campanulate, 8-10 mm long in fruit |
