Coi^oRADO Agricultural College 
THE SEED 
In Fig. 1 there is shown a diagrammatic section of the pistil 
of a typical flower after pollination and prior to fertilization. The 
sepals, petals, and stamens have been removed. The structure we 
Fig. 1. Diagrammatic, longitudinal section of a pistil 
showing embryo sac prior to fertilization. The pollen 
tube has entered the micropyle, grown through the 
nucellus and is about to come in contact with tlie nuclei 
of the embryo sac. 
are interested in within this pistil is the ovule, which develops into 
the seed. In the ovaries of some plants, as in the squash for 
example, there are many ovules and consequently many seeds, 
whereas, in the ovary of such plants as sunflower, lettuce, buck- 
