I was well aware of many such adaptations. A much enlarged
edition of my 'Fertilisation of Orchids' was published in 1877.

In this same year 'The Different Forms of Flowers, etc.,'
appeared, and in 1880 a second edition. This book consists
chiefly of the several papers on Heterostyled flowers originally
published by the Linnean Society, corrected, with much new matter
added, together with observations on some other cases in which
the same plant bears two kinds of flowers. As before remarked,
no little discovery of mine ever gave me so much pleasure as the
making out the meaning of heterostyled flowers. The results of
crossing such flowers in an illegitimate manner, I believe to be
very important, as bearing on the sterility of hybrids; although
these results have been noticed by only a few persons.

In 1879, I had a translation of Dr. Ernst Krause's 'Life of
Erasmus Darwin' published, and I added a sketch of his character
and habits from material in my possession. Many persons have
been much interested by this little life, and I am surprised that
only 800 or 900 copies were sold.

In 1880 I published, with [my son] Frank's assistance, our 'Power
of Movement in Plants.' This was a tough piece of work. The
book bears somewhat the same relation to my little book on
'Climbing Plants,' which 'Cross-Fertilisation' did to the
'Fertilisation of Orchids;' for in accordance with the principle
of evolution it was impossible to account for climbing plants
having been developed in so many widely different groups unless
all kinds of plants possess some slight power of movement of an
analogous kind. This I proved to be the case; and I was further