• Darwin Archive | 'Cross and self fertilisation': portfolios, 1840s-1876 | 'Cross and self fertilisation': experimental results, [1840s]-1875 | My son has considered under the same point of view the plants of the 8th & 9th(?) generation of Ipomaea, 1809-01-01 - 1882-04-30 | My son has considered under the same point of view the plants of the 8th & 9th(?) generation of Ipomaea, 1809-01-01 - 1882-04-30

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