The flower-fed buffaloes of the spring
In the days of long ago,
Ranged where the locomotives sing
And the prarie flowers lie low:
The tossing, blooming, perfumed grass
Is swept away by wheat,
Wheels and wheels and wheels spin by
In the spring that still is sweet.
But the flower-fed buffaloes of the spring
Left us long ago,
They gore no more, they bellow no more:--
With the Blackfeet lying low,
With the Pawnee lying low.

Vachel Lindsay

http://www.poemhunter.com/poem/the-flower-fed-buffaloes/