The New Pornographers' "Centre for Holy Wars"

This morning I listened to the New Pornographers' Mass Romantic, and I noticed a small thing about "Centre for Holy Wars."  During the "Hope grows greener than grass stains" tag at the end, the "grows" in the harmony part has a melisma.  It's sung to the phrase G# A# B.  Because it's sung to more syllables than it's usually spoken, there's a sense of that growing.