Families key
1 (a) Flower complete………………………………….…………………..…………………..2
1(b) Flower incomplete………………………………….……….………..…………………..4
2 (a) Petals free. ……………………………………………………….….…………………….3
2 (b) Petals fused, with 2 carpels…………………………………………….…. Apocynaceae
3 (a) Dome shaped thalamus……..……………………………….……………….…Malvaceae
3 (b) Disc shaped thalamus ……………………………………..…………….…..…Rutaceae
4 (a) Unisexual flower…………………………..………………..………………..…Moraceae
4 (b) Bisexual flower …………..…………………………………………..…..Amaranthaceae