--L. hyssopifolia homostyled.--Nesaea
verticillata trimorphic.--Lagerstroemia, nature doubtful.--Oxalis, trimorphic
species of.--O. Valdiviana.--O. Regnelli, the illegitimate unions quite barren.-
-O. speciosa.--O. sensitiva.--Homostyled species of Oxalis.--Pontederia, the one
monocotyledonous genus known to include heterostyled species.
CHAPTER V.
ILLEGITIMATE OFFSPRING OF HETEROSTYLED PLANTS.
Illegitimate offspring from all three forms of Lythrum salicaria.--Their dwarfed
stature and sterility, some utterly barren, some fertile.--Oxalis, transmission
of form to the legitimate and illegitimate seedlings.--Primula Sinensis,
illegitimate offspring in some degree dwarfed and infertile.--Equal-styled
varieties of P. Sinensis, auricula, farinosa, and elatior.--P. vulgaris, red-
flowered variety, illegitimate seedlings sterile.--P. veris, illegitimate plants
raised during several successive generations, their dwarfed stature and
sterility.--Equal-styled varieties of P. veris.--Transmission of form by
Pulmonaria and Polygonum.--Concluding remarks.--Close parallelism between
illegitimate fertilisation and hybridism.
CHAPTER VI.
CONCLUDING REMARKS ON HETEROSTYLED PLANTS.
The essential character of heterostyled plants.--Summary of the differences in
fertility between legitimately and illegitimately fertilised plants.
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