TYPICAL ERROR We planted wattles banksias grevillias and lilly pillies.
CORRECTION We planted wattles, banksias, grevillias and lilly pillies.
EXPLANATION The sentence above could have been written:
We planted wattles and banksias and grevillias and lilly pillies.
To avoid having to use and all the time, we can replace it with a comma when it is used to join words or phrases or clauses in a list. Hence, in the example, commas are required where and has been left out (but not where and has been used at the end):
We planted wattles, banksias, grevillias and lilly pillies.
Add commas to punctuate these sentences correctly.