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Updated: May 29, 2025
Cell contents often arranged in elegant patterns on the walls. Reproduction resulting from conjugation, followed by the development of a true spore, in some genera dividing into four sporules before germinating. OEdogoniaceae. Simple or branched aquatic filamentous plants attached without gelatine.
One of the commonest is something like a badly grown raspberry, being formed of a number of nearly globular chambers of different sizes congregated together. It is called Globigerina, and some specimens of chalk consist of little else than Globigerinæ and granules. Let us fix our attention upon the Globigerina. It is the spore of the game we are tracking.
These we always destroyed at a temperature of 180° F. Three of the sacs emitted spores that germinated at every temperature under 250° F. Two more only had their power of germination destroyed at 260° F. And one, the least of all the monad forms, in a heat partially fluid and partially dry, at all points up to 300° F. But if wholly in fluid it was destroyed at the point of 290° F. The average being that the power of heat resistance in the spore was to that of the adult as 11 to 6.
"When living smut spores are introduced into the soil with the seed wheat, or exist in the soil in which smut-free wheat is sown, a certain percentage of the wheat plants are likely to become infected. The smut spore germinates and produces first a stage of the smut plant in the soil.
Two families of lycopods deserve special mention, the Lepidodendrons and the Sigillaria. The LEPIDODENDRON, or "scale tree," was a gigantic club moss fifty and seventy-five feet high, spreading toward the top into stout branches, at whose ends were borne cone-shaped spore cases.
"Our own kind of life may have begun ages ago in much the same way. A spore from some far off world may have drifted here through space, found conditions just right, and taken root. Thus the spore of the sun the whispering spheres found a set of conditions fitted for growth. That metal pot is filled with seeds of the spheres.
Hassall records a case where it continued for nineteen minutes. The time, however, varies greatly, as in some cases the motion ceases almost as soon as the spore is liberated, while in open water, unretarded by the cover glass or other obstacles, its movements have been seen to continue for over two hours.
But now under all these, and many more, modified modes of multiplication, the physiologist finds complete uniformity. The starting-point, not only of every higher animal or plant, but of every clan of organisms which by fission or gemmation have sprung from a single organism, is always a spore, seed, or ovum.
To himself he may be of prime importance and first consideration, but in the general carrying out of the scheme he is a mote, a molecule, a spore, a protoplasm an infinitesimal, utterly inconsequential thing to be sacrificed without thought. Thus we diagnosed their mental poses.
Around on the rocks, in the cave-like chamber, are set beautiful ferns, with delicate fronds and enamelled stalks. The little frondlets have their points turned down, to form spore cases. It has very much the appearance of the maiden's hair fern, but is much larger. This delicate foliage covers the rocks all about the fountain, and gives the chamber great beauty.
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