In the context of Flowering Orchards, explain the White Orchard of the Flowering orchard triptych.
Continuing on with his paintings of orchards, Van Gogh wrote, "At the moment I am working on some plum trees, yellowish-white, with thousands of black branches." Two days later he wrote of the same painting, "This morning I worked on an orchard of plum trees in bloom; all at once a fierce wind sprang up, an effect I had seen nowhere else but here, and returned at intervals. The sun shone in between, and all the little white flowers sparkled. It was so lovely. My friend the Dane came to join me, and I went on painting at the risk and peril of seeing the whole show on the ground at any moment - it's a white effect with a good deal of yellow in it, and blue and lilac, the sky white and blue."