Mathrengyl Bearwalker: "The Arch Druid is always looking for additional morrowgrain for the Cenarion Circle's continued research. We take them in increments of ten, and award you with a cache of goods you should find useful. When you have ten, let me know and I will reward you accordingly." Use an Evergreen Pouch with a Packet of Tharlendris Seeds and two Un'Goro Soil samples to try and cultivate samples of Morrowgrain. Bring 10 Morrowgrain to Mathrengyl Bearwalker in Darnassus.