Lavandula 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 : 187

38. Lavandula L. 12

Small shrubs. Verticillasters in lax or crowded spikes; bracts differing distinctly from the leaves. Calyx (8-)13(-15)-veined, the teeth small, subequal; uppermost tooth usually with a cordate to obovate appendage at the apex. Corolla 2-lipped, usually pale purple to blue-violet; upper lip 2-lobed; lower lip 3-lobed, the lobes equal.

All species occur in dry, usually sunny habitats.

Literature; D. A. Chaytor, Jour. Linn. Soc. London (Bot.) 51: 153-204 (1937). A. Rozeira, Brotéria (Ser. Ci. Nat.) 18: 5-84 (1949). 1 Leaves toothed to 2-pinnatisect 2 Leaves crenate-dentate to pectinate-pinnatifid; flowers 6-10

in each verticillaster 3. dentata 2 Leaves mostly 2-pinnatisect; flowers 2 in each verticillaster

7. multifida

1 Leaves entire

3Upper bracts oblong-obovate, much longer than the flowers and the other bracts, and without flowers in their axils

4 Upper bracts white or purple; leaves tomentose 1. stoechas

4 Upper bracts green; leaves shortly hirsute 2. viridis

3 All bracts similar, not longer than the flowers and all with flowers in their axils

5 Bracts ovate-rhombic, cuspidate or acuminate; bracteoles minute or absent 4. angustifolia

5 Bracts linear or lanceolate; bracteoles 2-5 mm, linear or setaceous

6 Leaves very shortly and densely white-tomentose when young, grey-green and less densely tomentose when mature; calyx 13-veined 5. latifolia

6 Leaves densely and persistently white-lanate-tomentose; calyx 8-veined 6. lanata