Thoreau writes in his journal:
Again a strong cold wind from the north by west, turning up the new and tender pads. The young white lily pads are now red and crimson above . . .
At Kalmia Swamp.—Nemopanthes, apparently several days, and leaf say before tupelo. White spruce pollen one or two days at least, and now begins to leaf. To my surprise the Kalmia ylauca almost all out; perhaps began with rhodora. A very fine flower, the more interesting for being early . . .