CELASTRACEAE: Staff-tree Family
KEY TO SPECIES OF EUONYMUS
1. Underside of leaf blade with mostly erect hairs to ca 0.2 mm; petiole 8-20 mm ......................................................... E. atropurpurea
1. Underside of leaf blade glabrous, occasionally some hairs on midvein; petiole 4-33 mm .................................................. 2
2. Leaves evergreen (those of species 8 may be killed by severe cold) ......................................... 3
3. Petiole of the larger leaves (8)11-17 mm ................... E. fortunei
3. Petiole of the larger leaves 4-7(8) mm ................ E. kiautschovica
2. Leaves deciduous ........................................................... 4
4. Petiole 5-33 mm ......................................................... 5
5. Apex of leaf blade long-acuminate, teeth of the larger leaves 6-8 per cm .................................................. E. bungeana
5. Apex of leaf blade acute to short-acuminate, teeth of the larger leaves 8-11 per cm .................................. E. europaea
4. Petiole 1-5 mm .......................................................... 6
6. Stems trailing or decumbent, some twigs to nearly erect; leaf blade widest at or beyond middle ........................... E. obovata
6. Stems erect, occasionally some stems trailing; leaf blade widest at or below middle ......................................... 7
7. Twigs and small branches without corky wings. Largest mature terminal bud with ca 3 pairs of scales ............. E. americana
7. Twigs and small branches mostly with 2-4 corky wings. Largest mature terminal bud with 5-7 pairs of scales .................. E. alata