Trans. Roy. Soc. Edin. 37: 203-286 (1892)
XIV.—A Comparison of the Minute Structure of Plant Hybrids
with that of their Parents,
and
its Bearing on Biological Problems.
By J. MUIRHEAD MACFARLANE, D.Sc., F.R.S.E.
(Plates I.-VIII.)
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PAGE |
| I. |
INTRODUCTION |
203 |
| II. |
COMPARISON OF HYBRID STRUCTURE WITH THAT OF THE
PARENTS— |
|
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(a) Philageria Veitchii |
207 |
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(b) Dianthus Grievei |
220 |
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(c) Geum intermedium |
225 |
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(d) Ribes Culverwellii |
229 |
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(e) Saxifraga Andrewsii |
232 |
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(f) Erica Watsoni |
237 |
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(g) Bryanthus erectus |
238 |
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(h) Masdevallia Chelsoni |
242 |
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(i) Cypripedium Leeanum |
245 |
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(k) General Observations |
249 |
| III. |
COMPARISON OF THE COLOUR, CHEMICAL CONSTITUTION,
ODOUR, FLOWERING PERIOD, AND CONSTITUTIONAL VIGOUR OF HYBRIDS, WITH THOSE OF
THE PARENTS, |
254 |
| IV. |
HISTORY AND STRUCTURE OF Cytisus Adami |
259 |
| V. |
GENERAL SUMMARY OF RESULTS ON SEED HYBRIDS, |
270 |
| VI. |
THE BEARING OF HYBRIDITY ON BIOLOGICAL PROBLEMS— |
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(a) Relative
Potency of the Male and Female Sex Elements in the Formation of an Organism, |
272 |
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(b) Unisexual
Heredity, |
273 |
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(c) Bisexual
Heredity, |
274 |
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(d) On the
Divergence of some Hybrids, or Parts of Hybrids, towards one Parent |
275 |
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(e) Mechanical or
Physiological Obstacles to Fertilisation as an Explanation of Infertility in
some Hybrids, |
276 |
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(f) The Relative
Fertility of Hybrids in Relation to Heredity, |
277 |
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(g) Vegetable Cell
Structure in Relation to Hybridity, |
278 |
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(h) Value of
Microscopic Characters in the Future Verification of Doubtful Hybrids, |
281 |
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(i) A Consideration
of the Possible Origin of Species from Hybrids, |
282 |