• Darwin Archive | 'Cross and self fertilisation': portfolios, 1840s-1876 | 'Cross and self fertilisation': observations on insects visiting flowers and 'Cross and self fertilisation' experiments, 1840s-1860s | Insect visits and/or cross and self-fertilisation experiments; Dichogamy. | Saaft-maal (what is maal?) Nectar-guide or nectar spots nectar-marks, 1873-06-05 | Saaft-maal (what is maal?) Nectar-guide or nectar spots nectar-marks, 1873-06-05

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