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Updated: June 16, 2025
A plant may throw off bulbs, but these, sooner or later, give rise to seeds or spores, which develop into the original form. A polype may give rise to Medusae, or a pluteus to an Echinoderm, but the Medusa and the Echinoderm give rise to eggs which produce polypes or glutei, and they are therefore only stages in the cycle of life of the species.
As these processes of multiplication take place very rapidly, millions of spores are soon set free from a single infested plant; and, from their minuteness, they are readily transported by the gentlest breeze.
We have seen elsewhere what it is in the dust which makes it dangerous, how that, for the most part, it consists of the dust-like spores of the lepidodendron tree, fine and impalpable as the spores on the backs of some of our living ferns, and the fact that this consists of a large proportion of resin makes it the easily inflammable substance it is.
As Professor Asa Gray has remarked, "the spores and other reproductive bodies of many of the lower algae may claim to have first a characteristically animal, and then an unequivocally vegetable existence."
Fructification: by zoospores, either single or very numerous, and by resting spores formed in sporangial cells after the contents have been impregnated by the contents of autheridial cells of different forms. 8 Oscillatoriaceae. Plants growing either in the sea, fresh water, or on damp ground, of a gelatinous substance and filamentous structure.
It is only now commencing to be fully recognised that this is really a most dangerous explosive. As we have seen, large quantities of coal are formed almost exclusively of lepidodendron spores, and such coal is productive of a great quantity of dust.
Visited the Flushing district; examined for the gemiasma the same localities above named, but found only a few dried up plants and plenty of spores. With sticks dug up the earth in various places near by. Early in September revisited the same, but found nothing more; the incrustation, not even so much as before.
After the plant has completed its growth, which it generally does in about three weeks, more spores are produced to fly away with the wind, or be scattered by the movements of the coolies amongst the coffee, and thus the disease spreads. A great deal, of course, has been written about it, and those who desire more particular information may refer to Mr.
"A poisonous one has a ring around the stem, and it grows up out of a 'poison cup," explained Mary. "See, here are some more." Agony drew back as Mary pointed out another clump of the pale spores, innocent enough looking in their resemblance to the edible mushroom, but base villians at heart; veritable Borgias of the woods.
I even got to know some of their buzzing talk. Maybe I'll have to be their ambassador to human folks, sometime. They are from the planets of the stars, Frank. Sirius, I think. Tough little spores can be ejected from one atmosphere, and drift in space for millions of years... They arrived after the first Martians were extinct. Now that you're here, Frank, I wish you'd stay. But that's no good.
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