Bui. 844, U. S. Dept. of Agriculture. 
Plate II. 
Fig. I. — Median Section through an Ovule of Melilotus alba. 
The embryo sac is shown readv for fertilization. The egg and svnergids are in contact with the 
outer integument at the micropvlar end. The remains of the antipodals mar be seen at the 
chalazalend. X180. 
Fig. 2. — Section through an Ovule of Melilotus alba, about Three 
Days After Fertilization. 
The proembryo. the endosperm, and modifications of the integuments are shown. At this stage 
thesuspensbrisa prominent part of the proembryo. and the endosperm is most abundant around 
the embryo. The inner integument is being rapidly destroyed, and the outer integument is 
beginning to form the seed coat, as is indicated by the'modincations in the outer layer of its cells, 
which are elongating and thickening their outer" walls. X33. 
