1 | Leaves linear; lower lip of corolla ca. 5 times as long as upper lip |
1' | Leaves relatively broader; lower lip of corolla not more than 2½ times as long as upper lip |
2 | Leaves either all or at least lower ones petiolate; blades oblong, ovate or rhomboid and secondary veins in 6-7 pairs |
2' | Leaves all subsessile; blades ovate or ovate-elliptic and then with secondary veins in 4-5 pairs, or lanceolate with 5-6 pairs of secondary veins |
3 | Inflorescence capitate, usually 5-flowered; bracteoles and calyx lobes eglandular |
3' | Inflorescence spicate, flowers more numerous; bracteoles and calyx lobes glandular |
4 | Leaf blade lanceolate; bracts narrowly linear |
4' | Leaf blades ovate or ovate-elliptic; bracts linear-lanceolate |
5 | Leaf blade acute at base; bracts and bracteoles 3-veined; bracteoles and calyx lobes glandular |
5' | Leaf blade rounded at base; bracts and bracteoles 1-veined; bracteoles and calyx lobes eglandular |