Look through the reflector, and see if you can find something interesting.
See anything unusual on the purple plant?
There are two "antenna" on the very top of the purple plant. If you aim the reflector at them, they will stand up straight, and the plant will open up. Opening up the plant will help you later. You needed the moths over here for the plant to open because the plant likely needs them for pollination. Like other plants around here (e.g. the one that responds to the squee), it has adapted to follow the moths, just like an infant follows the spoon from which it is being fed. (Thanks for this idea about the moths, L Kline!)
Oops - I need to get back up to the big tree. How do I do that?
Can you explain what I'm actually trying to do on this level?