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

 

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