Abstract
THE pollen grains of certain liliaceous plants, for example Hyacinthus and Ornithogalum are known to give rise to embryo sac-like structures1. During the course of a study of the embryology of Leptomeria acida, L. cunninghamii and L. billardierii (Santa-laceae), I came across embryo sac-like structures arising directly from the microspore mother cells in the last named species—a phenomenon which is probably not yet recorded in any other angiosperm. Besides the microtome sections, acetocarmine squashes proved very useful for obtaining complete views of the ‘embryo sacs’.
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