Buddleja 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 : 202

1. Buddleja L. 1

Shrubs or small trees with interpetiolar stipules often reduced to a ridge. Hairs stellate. Inflorescence cymose, capitate or a long panicle. Calyx campanulate. Corolla with a nearly cylindrical tube and patent limb. Stamens included or very shortly exserted. Capsule septicidal.

1 Leaves densely tomentose beneath; corolla-tube straight

2 Corolla-tube 4-5 times as long as calyx; stamens inserted about the middle of the tube 1. davidii

2 Corolla-tube 2-3 times as long as calyx; stamens inserted near the top of the tube 2. albiflora

1 Leaves sparsely pubescent beneath; corolla-tube curved

3 Racemes erect; calyx-teeth as wide as long 4. lindleyana

3 Racemes pendent; calyx-teeth distinctly longer than wide 3. japonica