PLATE LV. 



Fig. 1. Cross section of young root, x 292. a, xylem; 6, phloem; c, 

 protoxylem point; d, heavy-walled endodermis ; e, cortex. 



Fig. 2. Cross section of stem, x 63. I, pith; q, air space in pith; «, 

 large cell in central portion of pith; k, xylem; j, phloem; h, bast fiber 

 bundle; /, epidermis; </, strengthened corner of stem; ;, chlorophyll tissue. 



Fig. 3. Stem epidermis, x 292. g, epidermal cell; h, stoma; /, glan- 

 dular hair. 



Fig. 4. Specialized glandular hair (m) from stem, x 292. 



Fig. 5. Hairs from leaf. Similar to those on stem, x 63. 



Fig. 6. Cross section of stem at corner, x 292. a, bast fibers; c, 

 sheath cell; v, parenchyma inside xylem, resembling phloem; p, lignified 

 pith cells. 



Fig. 7. Cross section of stem at side. X 292. o, chlorophyll cells; 

 p, air space; n, secondary epidermis; q, phloem; d, lignified parenchyma 

 connecting bundles; y, wood parenchyma; s, water tube; z, pith cell. 



