Many of the facts as to the occurrence of these cases were known before Darwin worked on them; but very little had been ascertained in regard to the sexual relation between the dimorphic and trimorphic forms, and it was here that Darwin obtained his most interesting results. The outcome of these different crossings are most curious. In the table, page 364, the results of the four combinations are given. It will be seen at once that the legitimate unions give more capsules, and the seeds weigh more, than in the illegitimate unions. The behavior of the offspring from seeds of legitimate and illegitimate origin is even more astonishing. Darwin found in _Primula veris_ (the form just described) that the seeds from the short-styled form fertilized with pollen from the same form germinated so badly that he obtained only 14 plants, of which 9 were short-styled and 5 long-styled. The long-styled form fertilized with its own-styled pollen produced “in the first generation 3 long-styled plants. From their seed 53 long-styled grandchildren were produced; from their seed 4 long-styled great-grandchildren; from their seed 20 long-styled great-great-grandchildren; and lastly, from their seed 8 long-styled and 2 short-styled great-great-great-grandchildren.” ══════════════╤═════════╤═════════╤═════════╤═════════╤═════════ │Number of│ │ Maximum │ Minimum │ Average Nature of │ Flowers │Number of│of Seeds │of Seeds │ No. of Union │Fertilized│ Seed │ in any │ in any │Seeds per │ │Capsules │ one │ one │ Capsule │ │ │ Capsule │ Capsule │ ──────────────┼─────────┼─────────┼─────────┼─────────┼───────── Long-styled │ 10 │ 6 │ 62 │ 34 │ 46.5 form by │ │ │ │ │ pollen of │ │ │ │ │ short-styled│ │ │ │ │ form: │ │ │ │ │ Legitimate │ │ │ │ │ union. │ │ │ │ │ ──────────────┼─────────┼─────────┼─────────┼─────────┼───────── Long-styled │ 20 │ 4 │ 49 │ 2 │ 27.7 form by │ │ │ │ │ own-form │ │ │ │ │ pollen: │ │ │ │ │ Illegitimate│ │ │ │ │ union. │ │ │ │ │ ──────────────┼─────────┼─────────┼─────────┼─────────┼───────── Short-styled │ 10 │ 8 │ 61 │ 37 │ 47.7 form by │ │ │ │ │ pollen of │ │ │ │ │ long-styled │ │ │ │ │ form: │ │ │ │ │