Noticed.

I sing of brooks, of blossoms, birds, and bowers
Of April, May, of June, and July-flowers.
I sing of maypoles, hock-carts, wassails, wakes,
Of bridegrooms, brides, and of their bridal cakes.
- Robert Herrick

I noticed again ...
Just now ...
The sweet, warm smell of September.
Is it the grass or the sun?