• Darwin Archive | 'Cross and self fertilisation': portfolios, 1840s-1876 | 'Cross and self fertilisation': experimental results, continued | 'Cross and self fertilisation': experimental results, continued | Scabiosa atro-purpurea (very unfavourable season) / Whole heads fertilised but number not recorded, 1867-01-01 - 1867-12-31 | Scabiosa atro-purpurea (very unfavourable season) / Whole heads fertilised but number not recorded, 1867-01-01 - 1867-12-31

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