I So FIELD OA TS. 



upper part of the embryo, the cotyledon or scutellum. 



b. The pointed lower extremity, the root sheath. 



c. Near (below) the center of this face of the embryo, 

 a minute bud, \he plumule. 



d. Just below the base of the plumule, a very short 

 stem, the caulicle? 



e. Draw the embryo as it lies exposed. 



Bisect a grain longitudinally through the groove. Mount 

 also a thin section from the cut surface. Note 



f. The scutellum, with its back against the starchy 

 part of the seed, its face just under the "skin" 

 at the upper part of the embryo. 



g. The plumule, on the face of the scutellum, at the 

 upper end of 



h. The caulicle; easily recognized as the whitish 

 part where the scutellum and plumule merge. 

 At its lower extremity is 



/. The root, a small rounded point, over which is 

 /. The root-sheath, which forms the lower extremity 



of the embryo. 

 k. Draw the section. 



Take a series of transverse sections from the bottom of 

 the grain upward. Examine the successive cut surfaces and, 

 comparing with the longitudinal sectin, determine the 

 various parts seen, root-sheath, root, caulicle, plumule, 

 scutellum. Draw those which show the section of root and 

 root-sheath, and the section of plumule and scutellum. 



MINUTE ANATOMY. 



A. THE ROOTS. Cut a transverse section of one of the 

 lateral roots at a little distance from the stem. Examine 

 with a low power, and note the two regions : 



6 111 defined and difficult to see. 



