word - A Resurrected Riley Riddle

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.

Answer

Is this a

BUTTERFLY?

My prefix won't stand, but it cracks at the bottom.

Haha, you said BUTT!! (Although it can't stand by itself, haha you said buttcrack!)

My suffix has heads in the clouds, not forgotten.

Although we'd like to forget about a FLY, we can't because waiter, they're in my soup again.

My infix is land, but no flowers can blossom.

This would be SURF AND TURF, where if flowers blossom you're doing it wrong.

My body has legs in a shroud, then wings open.

This is the BUTTERFLY coming out of its chrysalis and opening its wings, a sort of resurrected caterpillar. (What, you were expecting a fourth joke?) ;)