With regard to this last character it must be stated that the longer
of the two parental stems is usually exceeded by the hybrid, which is
possibly only attributable to the greater luxuriance which appears in
all parts of plants when stems of very different length are crossed.
Thus, for instance, in repeated experiments, stems of 1 ft. and 6 ft.
in length yielded without exception hybrids which varied in length
between 6 ft. and 7-1/2 ft.
The hybrid seeds in the experiments with seed-coat are often more
spotted, and the spots sometimes coalesce into small bluish-violet
patches. The spotting also frequently appears even when it is absent as
a parental character.
The hybrid forms of the seed-shape and of the albumen are developed
immediately after the artificial fertilisation by the mere influence of
the foreign pollen. They can, therefore, be observed even in the first
year of experiment, whilst all the other characters naturally only
appear in the following year in such plants as have been raised from
the crossed seed.