| Stems |
20‒100 cm tall, branches of first and second order present, third order sometimes present, hirsute and glandular pilose |
9‒15 cm tall, branches of -first order present or not sparsely to densely pilose with glandular papillae |
2‒10 cm tall, branches of first order usually absent, lanate-pilose |
| Leaves |
3‒22 × 2‒19 mm, ovate, acute or acuminate at apex, remotely serrulate, margins flat, hirsute |
5‒12 × 4‒8 mm, broadly ovate to rounded, obtuse at apex, entire, margins flat or sometimes slightly revolute, densely pilose with minutely glandular papillae |
2‒8 × 1‒5 mm, ovate or deltoid, obtuse at apex, entire, margins revolute, lanate-pilose |
| Inflorescence |
erect, corymbose |
erect, corymbose or not, sometimes slightly nodding |
unbranched, slightly nodding |
| Bracts |
2.5‒3 × 1.7‒2.2 mm, ovate, oval or obovate, acute to acuminate or obtuse at apex, light green |
3-5 × 2-3.2 mm, elliptic to obovate, acute to acuminate at apex, green to purplish, |
5‒7 × 2.5‒4 mm, obovate to oval, acute to acuminate at apex, partly purplish |
| Calyx |
2‒2.5 mm long, 1-lipped for 9/10, upper lip entire or denticulate |
3.5‒4 mm long, 2-lipped, upper lip entire to 3-toothed, lower lip 2- toothed |
4‒5 mm long, 2-lipped, upper and lower teeth well developed |
| Corolla |
3.5‒4 mm long, white |
3.5‒5 mm long, white |
5‒6 mm long, pink |
| Stamens |
4 or 0, if 4, protruding |
4, immature, included in corolla |
4, all stamens clearly exserted from corolla |