Among our native plants, the one that takes broad marshes to itself and presents vast sheets of color is the marsh milkweed, far less brilliant than the loosestrife or the mallow, still a missionary in the wilderness, lighting up many waste places with its humbler tints of purple. One sometimes seems to discover a familiar wild flower anew by coming upon it in some peculiar and striking situation. Our columbine is at all times and in all places one of the most exquisitely beautiful of flowers; yet one spring day, when I saw it growing out of a small seam on the face of a great lichen-covered wall of rock, where no soil or mould was visible,—a jet of foliage and color shooting out of a black line on the face of a perpendicular mountain wall and rising up like a tiny fountain, its drops turning to flame-colored jewels that hung and danced in the air against the gray rocky surface,—its beauty became something magical and audacious. On little narrow shelves in the rocky wall the corydalis was blooming, and among the loose bowlders at its base the blood-root shone conspicuous, suggesting snow rather than anything more sanguine. Certain flowers one makes special expeditions for every season. They are limited in their ranges, and must generally be sought for in particular haunts. How many excursions to the woods does the delicious trailing arbutus give rise to! How can one let the spring go by without gathering it himself when it hides in the moss! There are arbutus days in one's calendar, days when the trailing flower fairly calls him to the woods. With me, they come the latter part of April. The grass is greening here and there on the moist slopes and by the spring runs; the first furrow has been struck by the farmer; the liver-leaf is in the height of its beauty, and the bright constellations of the blood-root shine out here and there; one has had his first taste and his second taste of the spring and of the woods, and his tongue is sharpened rather than cloyed. Now he will take the most delicious and satisfying draught of all, the very essence and soul of the early season, of the tender brooding days, with all their prophecies and awakenings, in the handful of trailing arbutus which he gathers in his walk. At the mere thought of it, one sees the sunlight flooding the woods, smells the warm earthy odors which the heat liberates from beneath the dry leaves, hears the mellow bass of the first bumblebee, "Rover of the underwoods,"