The items indicated by the icons to the left of the 1.5 Anniversary Community Week (Hard) event missions indicate the rewards that will be awarded for completing that mission.
For example, the icon to the left of the “Plant 5,000 Baby Blue Eyes” in the Mission 1 is the red anemone nectar, which means you will receive the red anemone nectar if you complete this mission.
Please check the texts for the conditions to complete the mission.