FUNGUS SPORES
The greatest portion of the myriads of spores are wafted to the ends of the earth, and form an important element in the so-called "dust" so unwelcome to the tidy housewife. A sticky glass slide exposed to the deposit of such dust, and placed beneath the microscope, will reveal many fungus spores. The air is full of them.
A few of the various characteristic forms of these fungus-spores is shown on a previous page, somewhat as a powerful microscope would reveal them to us.
Whims of habitat
But it is only as they chance to alight individually in congenial conditions for growth that they will consent to vegetate. Thus billions of them are doomed to perish without progeny. These whims of habitat among the fungi are almost past belief. Here, for instance, is a tiny Puff-ball hardly larger than the period on this page. It bursts at the summit, and sheds its puff of microscopic spores, so light as to be without gravity, floating and settling everywhere upon the earth, but only as they chance to alight upon the spines of a dead chestnut-burr of two years' decay will they find heart to grow. Such is the fastidiousness of the little white mushroom, whose globular caps dot the spines of the decaying chestnut-burrs in so many damp nooks in the woods.
Curious fastidiousness
In closing my chapter a glance at the further eccentricities of choice will not be inopportune. I append a few taken at random from the pages of Berkeley, which lie open before me. In addition to the general broad distinctions of habitat as "woods," "rotten wood," "old pastures," "dunghills," we find such fastidious selections as the following, each by a distinct species with its own individual whim: "Dead fir-cones, sawdust, beechnuts, plaster walls, old fermenting coffee-grounds, wheat ears, cinders, dead oak leaves, old linen, wheat bread, hoofs, feathers, decayed rope, fat, microscopic lenses, and damp carpets."
A complete list of these exclusive habitats of fungi would well fill a large book, and might indeed almost involve the "index" of our botanies and zoologies, to say nothing of organic substances generally.
House-fly fungus