The Different Forms of Flowers on Plants of the Same SpeciesDarwin, Charles
Science
The Different Forms of Flowers on Plants of the Same Species
Darwin, Charles
Fertilization of plants; Heterostylism; Plant physiology; Plants -- Variation; Pollination
Column 3: Illegitimate union.
Long-styled oxlip, by pollen of long-styled primrose: 11 flowers fertilised,
produced four capsules, containing 10, 7, 5, and 6 wretched seeds. Average 7.0.
Column 4: Legitimate union.
Long-styled oxlip, by pollen of short-styled primrose: 5 flowers fertilised,
produced five capsules, containing 26, 32, 23, 28, and 34 seeds. Average 28.6.
TABLE 2.17. Both forms of the Cowslip crossed with Pollen of both forms of the
Oxlip.
Column 1: Illegitimate union.
Short-styled cowslip, by pollen of short-styled oxlip: 8 flowers fertilised, did
not produce one capsule.
Column 2: Legitimate union.
Long-styled cowslip, by pollen of short-styled oxlip: 8 flowers fertilised,
produced one capsule, containing 26 seeds.
Column 3: Illegitimate union.
Long-styled cowslip, by pollen of long-styled oxlip: 8 flowers fertilised,
produced three capsules, containing 5, 6 and 14 seeds. Average 8.3.
Column 4: Legitimate union.
Short-styled cowslip, by pollen of long-styled oxlip: 8 flowers fertilised,
produced 8 capsules, containing 58, 38, 31, 44, 23, 26, 37, and 66 seeds.
Average 40.4.
TABLE 2.18. Both forms of the Primrose crossed with Pollen of both forms of the
Oxlip.
Column 1: Illegitimate union.
Short-styled primrose, by pollen of short-styled oxlip: 8 flowers fertilised,
did not produce one capsule.
Column 2: Legitimate union.
Long-styled primrose, by pollen of short-styled oxlip: 8 flowers fertilised,
produced two capsules, containing 5 and 2 seeds.
Column 3: Illegitimate union.
Long-styled primrose, by pollen of long-styled oxlip: 8 flowers fertilised,
produced 8 capsules, containing 15, 7, 12, 20, 22, 7, 16, and 13 seeds. Average
14.0.
Column 4: Legitimate union.
Short-styled primrose, by pollen of long-styled oxlip: 8 flowers fertilised,
produced 4 capsules, containing 52, 52, 42, and 49 seeds, some good and some
bad. Average 48.7.
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