Flora Europaea. Volume 3. Diapensiacea to Myoporaceae Author Tutin, T. G. Author Heywood, V. H. Author Burges, N. A. Author Moore, D. M. Author Valentine, D. H. Author Walters, S. M. Author Webb, D. A. text 1972 Cambridge University Press Cambridge book 10.5281/zenodo.305475 305475 6. S. balansae Boiss. & Kotschy in Boiss., FI. Or. 4: 722 (1879) (incl. S. heterodonta Zefirov ). Erect, grey, patent- or crispate-hairy perennial 60-100 cm. Leaves 30-100 x 15-50 mm, oblong-ovate, truncate or more or less cordate at base, crenatedentate, sparsely hairy above, tomentose beneath. Verticillasters many-flowered, mostly distant; pedicels 1-2 mm in flower. Calyx 8-9 mm; teeth unequal, the uppermost c. | as long as tube. Corolla c. 13 mm, pink, densely villous; upper lip entire. Meadows and wood-margins. Krym. Rs (K). (Caucasian region.) (7-16). S. germanica group. Erect, grey- or white-hairy perennials (10-)20-100(-120) cm. Leaves usually crenate or crenate-serrate. Verticillasters many-flowered, usually distant; flowers sessile or subsessile. Calyx 6-12 mm; teeth equal or unequal. Corolla 15-25 mm, usually pink or purple, densely hairy; upper lip entire or emarginate. A taxonomically difficult group in need of revision. Species 8-15 are often difficult to distinguish from each other and some authors have considered them to be variants of a single species. 1 Stem with glandular hairs 7. alpina 1 Stem without glandular hairs 2 Most leaves ± cuneate at base 3Calyx-teeth recurved after flowering, usually glandular 12. thirkei 3Calyx-teeth not recurved, eglandular 4 Upper surface of leaves moderately densely hairy, the surface more or less visible beneath the indumentum 14. eretica 4 Upper surface of leaves densely sericeous-lanate, the surface completely obscured by the indumentum 15. byzantina 2 Most leaves truncate or cordate at base 5Calyx-teeth 5-7 mm, with an arista 1*5-3 mm 13. cassia 5Calyx-teeth 3-5 mm, with an arista less than l*5(-2) mm 6 Leaves green beneath 16. heraclea 6 Leaves grey-green to white beneath 7 Whole plant very densely white-tomentose or lanatetomentose; calyx-teeth all equal 8 Stem usually more than 30 cm; upper bracts shorter than flowers; bracteoles lanceolate 10. tournefortii 8 Stem 15—30 cm; upper bracts exceeding flowers; bracteoles subulate 11. sericophylia 7 At least the upper surface of the leaves grey-green and only moderately densely tomentose; upper 2 calyx-teeth usually longer than the lower 3 9 Calyx-teeth eglandular, not recurved in fruit 8. germanica 9 Calyx-teeth glandular, usually ± recurved in fruit 9. tymphaea