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Darwin, Charles, 1809-1882

"The Autobiography of Charles Darwin"

K. Sprengel's wonderful book, 'Das
entdeckte Geheimniss der Natur.' For some years before 1862 I
had specially attended to the fertilisation of our British
orchids; and it seemed to me the best plan to prepare as complete
a treatise on this group of plants as well as I could, rather
than to utilise the great mass of matter which I had slowly
collected with respect to other plants.
My resolve proved a wise one; for since the appearance of my
book, a surprising number of papers and separate works on the
fertilisation of all kinds of flowers have appeared: and these
are far better done than I could possibly have effected. The
merits of poor old Sprengel, so long overlooked, are now fully
recognised many years after his death.
During the same year I published in the 'Journal of the Linnean
Society' a paper "On the Two Forms, or Dimorphic Condition of
Primula," and during the next five years, five other papers on
dimorphic and trimorphic plants. I do not think anything in my
scientific life has given me so much satisfaction as making out
the meaning of the structure of these plants. I had noticed in
1838 or 1839 the dimorphism of Linum flavum, and had at first
thought that it was merely a case of unmeaning variability. But
on examining the common species of Primula I found that the two
forms were much too regular and constant to be thus viewed. I
therefore became almost convinced that the common cowslip and
primrose were on the high road to become dioecious;--that the
short pistil in the one form, and the short stamens in the other
form were tending towards abortion.


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