THE SEED 19 
between the inner and outer layers? Look at the base of the 
nypocotyl for some loose, cobwebby appendages. These are 
the remains of other embryos with certain append- 
ages belonging to them that were formed in the 
endosperm, but failed to develop. Did you find 
remains of this kind in any of the other seeds ex- 
amined? Pick out the embryo from the endo- 
sperm and test both for food substances. Which ~ 
of these do you find? Which are absent? How ee 
does the embryo differ from those already exam- Pine seed, 
ined? How many cotyledons are there? Make oa ec 
an enlarged sketch of a seed in longitudinal sae ane 
ryo (GRayY). 
section, labeling correctly all the parts observed. 
16. Comparison as to food value of seeds. — Make in your 
notebook a tabular statement after the model here given, of 
the food contents found in the different seeds you have ex- 
amined. Indicate the relative quantity of each by writing 
under it, in the appropriate column, the words, “ much,” 
“little,” or “‘ none,” as the case may be. 
By far the greater number of seeds contain endosperm ; 
that is, they consist of an embryo with more or less nourishing 
Mopet For Recorp or SEEDS EXAMINED 
Foovs Trestep 
Seeps ExamMiepD 
Starch Sugar Oil Proteins 
Corn 
Wheat . 
Bean 
Squash . 
Castor bean . 
