• Darwin Archive | 'Insectivorous plants': portfolios, 1860 - 1876 | Experimental treatments and observations, 1873-1875 | Notes on carnivorous plants, 1873 - 1874 | Utricularia / The globular head, unicellular, the glands on margin & on valve have a nucleus & a layer of protoplasm all round walls [application of carbonate of ammonia, nitrate of ammonia, 1874-07-20 | Utricularia / The globular head, unicellular, the glands on margin & on valve have a nucleus & a layer of protoplasm all round walls [application of carbonate of ammonia, nitrate of ammonia, 1874-07-20

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