Ballota L.

Tutin, T. G., Heywood, V. H., Burges, N. A., Moore, D. M., Valentine, D. H., Walters, S. M. & Webb, D. A., 1972, Flora Europaea. Volume 3. Diapensiacea to Myoporaceae, Cambridge: Cambridge University Press : 149-150

15. Ballota L. 2

Perennial herbs or small shrubs. Verticillasters few- to manyflowered. Bracteoles present. Calyx 10-veined; limb undulate, or with 5-16 crenations or teeth, the lobes more or less mucronate or gradually narrowed into an awn, rarely entire. Corolla-tube shorter than or equalling calyx, with a ring of hairs inside. Stamens parallel, the outer pair the longer; anther-cells diverging. Style-branches subequal. Nutlets oblong, rounded at apex.

Measurements relating to the calyx do not include awns or mucros.

Literature: A. Patzak, Ann. Naturh. Mus. (Wien) 62: 57-86

(1958); 63: 33-81 (1959); 64: 42-56 (1961).

1 Small shrub; bracteoles pungent 1. frutescens 1 Herb; bracteoles not pungent 2 Verticillasters 6- to 12-flowered; calyx-limb undulate or irregularly crenate, smooth or mucronulate

3 Calyx-limb (12—)15-20 mm in diameter 2. acetabulosa

3 Calyx-limb 7-8 mm in diameter 3. pseudodictamnus

2 Verticillasters usually more than 12-flowered; calyx-limb dentate 4 Calyx-lobes 5, regular 7. nigra 4 Calyx-lobes 6-many, ± irregular 5 Calyx-limb 8-10 mm in diameter; lobes mucronulate 4. hirsuta 5 Calyx-limb 4-6 mm in diameter; lobes awned 6 Calyx 8-10 mm; lobes triangular-lanceolate 5. rupestris 6 Calyx 7-8 mm; lobes broadly triangular 6. macedonica