in Thoreau’s Journal:

The Female Maple is more crimson—the male more scarlet. The horse-chestnut buds are so advanced that they are larger than the leaves of any tree.— The elder—the wild cherry thimble-berries—sweet-briars, cultivated cherry & apples &c White birches hazels-aspens-hornbeams-maples &c &c not quite the hickory and alder-are opening their budsThe alders are beginning to. It is pleasant when the road winds along the side of a hill with a thin fringe of wood through which to look into the low land— It furnishes both shade & frame for your pictures…