How can I recognize cereals ?

Here's a picture of some cereals. Can you recognize them ?

Do you know a way to be able to recognize all cereals (website or whatever) ?

Thank you.

 

Hello

these may help
http://www.turffiles.ncsu.edu/turfid/ItemID.aspx?orderID=GR&orderDesc=Grass

http://www.caf.wvu.edu/~forage/library/cangrass/content.htm

http://www.hort.iastate.edu/courses/syllabi/hort351/pictures/grasstable/cool2.html

I know the last one is on turf grass but its got good pictures to help with basic morphology

 

Left to right:
1 - not sure, possibly an immature Cоck's-foot Dactylis glomerata.
2 - Barley Hordeum sp.
3 - not sure.
4 - looks like Drooping Brome Anisantha tectorum (syn. Bromus tectorum).
5 - Cоck's-foot Dactylis glomerata.