Can you help ID?

Hi,

Can you confirm or ID the following?
1. Ajuga?
2. a weed (do you know what it is? good? bad?)
3. Is this another weed growing in with my irises?
4. yellow rocket/winter cress or something else?

Thank you!

 

purple fan flower is the first one.

 

#1 Ajuga
#2 apears to be a Veronica
#3 Sweet Clover
#4 a Brassica

 

1. Looks more like Ajuga genevensis than A. reptans. Not usually considered a weed but can spread in diameter at amazing speed

2. Agree with Chris, one of the weedy Veronica species. Not usually major nuisances.

3. Melilotus sp. Is that the same as "Sweet Clover"?

4. Possibly Brassica rapa, Wild Turnip or Field Mustard

 

Thank you for the ID and for your time! Very helpful and truly appreciated!