Mary Constance Blair, US botanist. Mary Constance Blair (1877-1955) was a professor of botany at Northwestern University, USA, where she had earned an

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Mary Constance Blair, US botanist. Mary Constance Blair (1877-1955) was a professor of botany at Northwestern University, USA, where she had earned an in 1918 and a in ecology in 1922, the first such degree awarded at the school.

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