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Impenetrable and therefore weedless; for no plant life can flourish there, nor animal nor bird. Scarce a beetle runs bewilderingly through those forbidding colossal solitudes. The field-sparrow will flutter away from pollen-bearing to pollen-receiving top, trying to beguile you from its nest hidden near the edge.
In many cases this is assured by the pollen-bearing flowers and stigmatic flowers being entirely distinct, as in cucumbers and Indian-corn; perhaps on different plants, as in the palms and willows; again by the pollen maturing and disseminating before the stigma is mature, as already mentioned, and vice versa.
Ordinary mosquito netting will not serve after it has been wet with dew or rain, as the mesh becomes so loose that energetic little pollen carrying bees force their way through, often entirely spoiling results. The pollen-bearing blooms should be carefully selected to open the same day and should be as well protected with muslin or fine netting as possible to prevent robbery of pollen.
In the dividing of the two growth-principles in the plant through the formation of carpel and pistil, on the one hand, and the pollen-bearing stamens on the other, and in their reunion through the coming together of the pollen with the seed, Goethe recognized a metamorphosis of the process of anastomosis at a higher level. His vision of it caused him to term it 'spiritual anastomosis'.
For in these older stigmatic flowers the anther as it comes down upon his back is seen to be withered, having shed its pollen several days since, the supply of pollen on the bee's body being sufficient to fertilize all the stigmas in the cluster, until a new supply is obtained from the pollen-bearing blossoms above. And thus he continues his rounds.
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