The freely expanded specimen of this species is full of beauty, in its wavy fan-like form and flowing lines and flutings presenting a suggestive decorative theme, whether in the branches of painting, sculpture, or the plastic arts. The pores upon its sulphurous surface are so minute as to be scarcely visible, but they shed a copious quantity of whitish spores. The pileus of the dried specimen is often more or less frosted with minute white crystals—binoxalate of potash—and the spore surface dulls to the color of buckskin.
Luminous by night
Another remarkable feature about this fungus, if report be true, is its visibility by night, not merely from its pale yellow hue, but by an actual flood of bluish luminous phosphorescent light, the environment of its haunt in the woods sometimes being lighted up by the effulgence from its ample mass of growth, a resource not uncommon among the fungi, and popularly known under the name of "foxfire." This phenomenon is frequently observable in woods at night, following rainy weather. An old stump or prostrate log will appear streaked with lines of brilliant light. If we approach and detach the loosened bark, its back and the decayed surface of the log thus exposed will prove ablaze in phosphorescence, whose presence had scarcely been suspected but for the chance fissures which revealed the telltale streaks. I recall from my boyhood experience one such midnight episode as this in which, from the peculiar outline of the fallen trunk and the coincident circumstance of two approximate dots of brilliant light suggesting the eyes of a huge puma or tiger, I stood spell-bound with momentary fear, until I realized that the apparition was only a bugaboo after all. Approaching in the darkness, I soon laid hold of the rough head of the monster, and with a strong pull at the mass of bark of which it was composed, laid bare several square feet of blazing phosphorescence whose only hint had gleamed through those two imaginary eyes, which proved to be holes which had disclosed the hidden luminous fungus. One authority describes a single mass of this phosphorescence as extending the entire length of a prostrate trunk thirty feet long.
Hawthorne records having made good use of foxfire upon one occasion when, left in the lurch at night by a canal-boat, he procured a phosphorescent flambeau which effectually lighted his path for several miles through the otherwise impassable woods.
