Orange you glad it's not ALL green? (summer greens part 2)

As the summer progresses, grasses start to take on a warmer tone, and late summer paintings benefit from underpaintings in orange and purple.  I recently completed this one, titled 'Til the Cows Come Home, by underpainting entirely with tones of orange (pale peach under the sky, pure orange under the grasses, and deep orange under the trees) and a red violet under the shadow areas.  You can still see the underpainting quite clearly in the detail shots, tying together all the varied greens in the scene.