Hawk's-beard's for ID

[davidbr]

I'm not too confident on these yellow daisy-type plants, so I'd be very grateful for some help on these Crepis, hawk's-beard, species...

1:



2:



3:



4:

[pleb]

Hi David,

Have you considered whether some or all of the plants might not be Hawkweeds, Hieracium species?

[Tiggrx]

These things aren't easy - especially from pictures

I'm pretty sure that 2 is Beaked Hawk's-beard (Crepis vesicaria) and that 4. is a Hawkweed (Hieracium sp.).