포도속 Vitis LINN.

1. 잎은 15 cm보다 길고 잎자루는 붉은빛이 돈다.

2. 잎은 뒷면에 잔털이 있거나 없고 녹색이다 ·························································································1133. 왕머루

2. 잎은 뒷면에 갈색 털이나 솜털로 덮여서 회색이 돈다.

3. 잎 뒷면에는 갈색 털이 끝까지 남아 있다 ···························································································1133+. 머루

3. 잎 뒷면에 솜털이 있다  ···········································································································1134. 포도나무

1. 잎의 길이는 10cm보다 짧다.

4. 잎은 대개 5 개로 갈라지고 뒷면에는 갈색 또는 흰 털이 밀생한다     ·····················································1135. 까마귀머루

4. 잎은 대개 갈라지지 않고 3 각형이나 난형이며 뒷면 맥 상에 잔털이 있다     ··················································1136. 새머루