I love the jelly-roll plants too. They are singing that.
Maybe they grow on Big Rock-candy Mountain. That is if it's the cake we're talking about and not the other kind of jelly-roll. Although --the other kind is surely there too judging by the darker meanings within the Big Rock-candy Mountain song.
Me-- I'm an Aussie so we call the cake a jam-roll and the other kind belongs in blues but not in Aussie-speak.

Speaking of hair. I always loved the wildwood-flower girl with the raving black hair. Driven mad by love she was, so it figures.
Cheers, Joy