Celtis, Linnaeus (1753:, 1043

Key to the species and variety of Celtis View in CoL from China

1. Evergreen trees; flowers in dense cymes; drupes 3–6 per raceme.....................................................................................................2

- Deciduous trees or shrubs (sometimes semi-evergreen in C. tetrandra View in CoL ); flowers solitary, fascicled or racemose; drupes solitary or two per leaf axils................................................................................................................................................................................4

2. Styles apically thickened, forked; drupes ovoid, apex emarginate.....................................................................................................3

- Styles linear, undivided; drupes broadly ovoid, apex shortly beaked ............................................................................ C. timorensis View in CoL

3. Trees to 30 m tall; leaves 8–18 cm long; drupes 10–15 mm long.................................................... C. philippensis var. philippensis View in CoL

- Trees 3–12 m tall; leaves 3–10 cm long; drupes 8–12 mm long.......................................................... C. philippensis var. consimilis

4. Drupes 9–15 mm long; leaf blades toothed on apical half or almost to base of margin....................................................................5

- Drupes 5–9 mm long; leaf blades toothed only on apical half at margin, or sometimes entire.........................................................9

5. Leaf blades laciniate-toothed at margin, apex truncate with a caudate tip...................................................................... C. koraiensis View in CoL

- Leaf blades evenly toothed at margin, apex acuminate......................................................................................................................6

6. Leaf blades finely toothed on 1/5–2/3 margin from base to apex; drupes yellow to orange..............................................................7

- Leaf blades sharply toothed to base of margin; drupes blackish blue ............................................................................. C. cerasifera View in CoL

7. Young shoots and petioles densely pubescent; leaf blades abaxially densely pubescent...................................................................8

- Young shorts and petioles glabrous; leaf blades abaxially glabrous or sparsely pubescent................................... C. vandervoetiana View in CoL

8. Young shoots, petioles and leaf blades abaxially golden pubescent; fruit pedicels densely golden pubescent ................. C. julianae View in CoL

- Young shorts, petioles and leaf blades abaxially whitish pubescent; fruit pedicels glabrous or sparsely white pubescent................. ........................................................................................................................................................................................... C. neglecta View in CoL

9. Bud scales densely strigose .................................................................................................................................................. C. biondii View in CoL

- Bud scales glabrous or inconspicuously puberulent.........................................................................................................................10

10. Fruit pedicels 5–15 mm long, 1–2 as long as subtending petioles...................................................................................................11

- Fruit pedicles 10–25 mm long, 2–4 as long as subtending petioles.................................................................................................12

11. Leaf blades conspicuously oblique at base, apex acuminate to caudate-acuminate; drupes 7–8 mm in diam ................ C. tetrandra View in CoL

- Leaf blades slightly oblique at base, apex shortly acuminate; drupes 5–7 mm in diam .................................................... C. sinensis View in CoL

12. Drupes solitary in leaf axils, blackish blue...................................................................................................................... C. bungeana View in CoL

- Drupes 2 or 3 per leaf axils, brownish red................................................................................................................. C. chekiangensis View in CoL