The importance of the several foregoing
conclusions will be apparent at the close of this chapter, when the illegitimate
unions between the forms of the same species and their illegitimate offspring,
are compared with the hybrid unions of distinct species and their hybrid
offspring.
OXALIS.
No one has compared the legitimate and illegitimate offspring of any trimorphic
species in this genus. Hildebrand sowed illegitimately fertilised seeds of
Oxalis Valdiviana, but they did not germinate (5/4. 'Botanische Zeitung' 1871
page 433 footnote.); and this fact, as he remarks, supports my view that an
illegitimate union resembles a hybrid one between two distinct species, for the
seeds in this latter case are often incapable of germination.
[The following observations relate to the nature of the forms which appear among
the legitimate seedlings of Oxalis Valdiviana. Hildebrand raised, as described
in the paper just referred to, 211 seedlings from all six legitimate unions, and
the three forms appeared among the offspring from each union. For instance,
long-styled plants were legitimately fertilised with pollen from the longest
stamens of the mid-styled form, and the seedlings consisted of 15 long-styled,
18 mid-styled, and 6 short-styled. We here see that a few short-styled plants
were produced, though neither parent was short-styled; and so it was with the
other legitimate unions.
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