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This Etext prepared by Sue Asscher asschers@dingoblue.net.au
THE DIFFERENT FORMS OF FLOWERS ON PLANTS OF THE SAME SPECIES
by CHARLES DARWIN, M.A., F.R.S.
TO
PROFESSOR ASA GRAY
THIS VOLUME IS DEDICATED BY THE AUTHOR
AS A SMALL TRIBUTE OF RESPECT AND AFFECTION.
CONTENTS.
INTRODUCTION.
CHAPTER I.
HETEROSTYLED DIMORPHIC PLANTS: PRIMULACEAE.
Primula veris or the cowslip.--Differences in structure between the two forms.--
Their degrees of fertility when legitimately and illegitimately united.--P.
elatior, vulgaris, Sinensis, auricula, etc.--Summary on the fertility of the
heterostyled species of Primula.--Homostyled species of Primula.--Hottonia
palustris.--Androsace vitalliana.
CHAPTER II.
HYBRID PRIMULAS.
The oxlip a hybrid naturally produced between Primula veris and vulgaris.--The
differences in structure and function between the two parent-species.--Effects
of crossing long-styled and short-styled oxlips with one another and with the
two forms of both parent-species.--Character of the offspring from oxlips
artificially self-fertilised and cross-fertilised in a state of nature.
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