Studies on Some Anomalous Dicotyledonous Plants

In each of the three plants studied the embryo is small, surrounded by a large amount of endosperm richly stored with starch. 2. In each case the cotyledonar primordium is a broad, ridge-like structure open at one side. This ridge later bifurcates opposite the opening to form two lobes, the cotyledons. The two notches soon become of almost equal depth, so that older stages do not give a correct impression of the origin of the cotyledons. 3. In Podophyllum a long cotyledonar tube is formed, and in Caulophyllum the edges of the cotyledons are close together. The plumule of Jeffersonia is not inclosed in either way. 4. The plumule is not well developed in any of these embryos, but has a central origin in each.