Fragments of the natural ...

Fragments of the natural method must be sought with the greatest care. This is the first and last desideratum among botanists. Nature makes no jumps. [Natura non facit saltus] All taxa show relationships on all sides like the countries on a map of the world.
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 Carl Linnaeus

Quotes from the same author

If a tree dies, plant another in its place.
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 Carl Linnaeus
Of what use are the great number of petrifactions, of different species, shape and form which are dug up by naturalists? Perhaps the collection of such specimens is sheer vanity and inquisitiveness. I do not presume to say; but we find in our mountains the rarest animals, shells, mussels, and corals embalmed in stone, as it were, living specimens of which are now being sought in vain throughout Europe. These stones alone whisper in the midst of general silence.
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 Carl Linnaeus