42 STUDIES OF PLANT LIFE. 
3. The entire structure within the seed-coat is the 
embryo. 
4. To what are the two large structures (seed-leaves or 
cotyledons) attached? The small leaf-like struc- 
tures constitute the plumule. The small stem to 
which all are attached is the caulicle or hypocotyl. 
5. The place of leaf attachment isa node. The portion 
of the stem between two nodes is an internode. 
How many of each are present? The end of the 
stem opposite the plumule is the radicle or root end. 
6. With the cotyledons spread apart and properly at- 
tached, draw (x 2) and designate all structures. 
(6) THE CORN SEED. 
A. External Structure. 
1. The small structure by which the seed was attached 
to the cob is the funiculus. What is its form ? 
2. How do side and edge views differ ? 
3. How do the ends compare ? 
4. The lighter colored elliptical area on one side is the 
embryo. The large white or yellowish portion is 
the endosperm. 
5. Make an embryo side view drawing (del. 1 in.) and 
designate all structures. 
B. Internal Structure. 
1. Remove the funiculus and find the hilum. What is 
its form ? 
2. Remove the testa from the embryo surface. Observe 
the one large flat cotyledon(?) (scutellum) and the 
small caulicle to which it is attached on the outer 
surface. Find the radicle end and the plumule 
(apical bud) end. 
