Bui. 844, U. S. Dept. of Agriculture. 
Plate III, 
Fig. I. — Section of an Ovule of Melilotus alba after Fertilization. 
The stage of development is a little later than that shown in Plate II, figure 2. The embryo is 
embedded deeply in endosperm tissue. X45. 
Fig. 2. — Section through an Ovule of Melilotus alba after the Embryo 
is Nearly Half Mature. 
But little endosperm remains except in the chalazal end, and very little remains of either the 
nucellus or inner integument. The modifications which transform the outer integument into a 
seed coat are well under way. Not only the outer layer of cells which becomes the Malpighian 
layer is quite well modified, but also the layer beneath is being transformed into the osteosclerid 
layer. X30. 
