Development of the Megagametophyte and Embryo of Allium mutabile

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Abstract
Two megaspores are produced; one disintegrates and the other continues to divide unequally, forming the megagametophyte. From the functional megaspore 2, and ultimately 4, larger unequal nuclei and 2 smaller nuclei develop. The former mature and develop the nuclei of the mega- gametophyte, which at maturity contains a very large vacuolated egg, a small synerged, and 2 smaller polar nuclei. The embryo develops normally. The notch and stem tip are formed between the root, which develops from a cell cut off from the suspensor, and the cotyledon. It compares essentially with those of other spp. reported. Results of hand pollination show that both self- and cross-pollination are effective. The existence of unusual nucellar cells is included in the report.

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