How do I post this to name that plant and the butterfly discussion boards? Not able to from the app.

No, but that butterfly is gorgeous!

I don't use the app, I'm on a desktop. When I post, I'm able to choose up to three forums to post to, it's the next screen that pops up you just put a check next to the other forums; sometimes you have to scroll down a ways to find the one you want. IDK how posting works on the app, though.

Until you figure it out, you can just make a duplicate post on those forums.