PAPILONACEOUS

What a cornucopia of shapes make up our world and delight the eye
Linear and symmetrical forms of straight and rigid do dominate, but why?
A series of polygons make up things shaped from squares like a refrigerator or a book
And are reflections of the measured hand of man and are everywhere you choose to look

Unless of course you look to nature where straight is not the more common rule
And to draw the forms of nature there doesn’t seem to be a universal tool
So many shapes it boggles the mind like lunette shaped describing a crescent moon
Or papilionaceous resembling a butterfly, or the protean form of a moth’s cocoon

So many words in our extensive vocabulary describe the shapes and forms of the natural world
Pinnate, doubly pinnate, serrate and doubly serrate, ovoid, obrotund and whorled,
Lobed and truncated and bivalve with opposite symmetry and don’t forget asymmetrical.
There are likely shapes in nature that have never been described and are only theoretical.

relating to or denoting leguminous plants of a group — subfamily Papilionoideae or family Papilionaceae — with flowers that resemble a butterfly.