Adjective
of grain that has not been converted into malt
Source: WordNetunmalted barley Source: Internet
More recently, 'stout' tends to be used to describe dry stouts, (containing a small amount of unmalted roast barley), or sweet stouts, (such as milk stouts), whilst 'porter' describes a beer flavoured with roast malted barley. Source: Internet
Some have roasted unmalted barley. Source: Internet