The Importance of Distinction

Here are two inflorescences from two different plants, one is edible one is not..can you tell the difference between them and what they are?

 

 

It's relatively easy to differentiate between whole plants but it's much more difficult when you only have part of a flower, even more so when you have to choose between them for a particular reason.. Make sure you know your stuff, don't guess.. if you're not sure then don't use them.