CHRISTIAN CONRAD SPRENGEL'S treatise on the structure and fertilisation of flowers, after well nigh a century of oblivion, has come to be recognised as one of the most interesting of books, and his ...
X. Lilium Martagon. C. SPRENGEL was the first to turn his attention to the structure of the beautiful flowers of this plant; †but he did not succeed either in observing insects visiting them or in ...
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