In a summer email from math-poet-editor Carol Dorf, I first enjoyed "If a Garden of Numbers" -- a mingling of numbers with the natural world -- by California poet Cole Swensen. I offer its opening lines below followed by a link to the complete poem.
If a Garden of Numbers by Cole Swenson
If a garden is the world counted
and found analogue in nature
One does not become two by ever ending
so the stairs must be uneven in number