Alliria's Tomb Level II - Spoilers
Each shade of Alliria wants one particular rose, or you can't get by. 
The Flower of Truth is the White Rose 
The Flower of Valor is the Blue Rose 
The Flower of Kinship is the Red Rose 
The Flower of Nature is the Yellow Rose 
The Flower of Alliria is the Rainbow Rose 
You get the Rainbow Rose by collecting some of the Rainbow Dragon's blood, and using it on the Rosebush with no roses. 
