I made a new Riley Riddle to make up for the laziness in my previous Riley Riddle, also inspired by @KevinL's Riley Riddle.
My prefix won't stand, but it cracks at the bottom.
My suffix has heads in the clouds, not forgotten.
My infix is land, but no flowers can blossom.
My body has legs in a shroud, then wings open.
What am I?
The answer is $9$ letters, and the title is a clue. For the last part, I can include the knowledge
tag... but as a hint, I won't — once you solve for the affixes, you will most likely know of the last line.