1a葉對生(每節(jié)著生2葉,成對排列)................2 |
1b葉互生(每節(jié)著生1葉,交叉排列)................3 |
2a葉橢圓.....................................4 |
2b葉針形..................................蘇鐵 |
3a葉橢圓,邊緣有齒........................茶花 |
3b葉披針形...............................柳樹 |
4a葉邊緣光滑..........................女貞 |
4b葉邊緣有齒.............................桂花 |