196 Nebraska Agricultural Exp. Station, Research Bui. 6. 
DESCRIPTION OF PLATE III. 
Fig. 1. — Longitudinal section of leaf. X 233. 
Section taken midway between two vascular strands, a, upper 
epidermis, b, lower epidermis, c, spongy chlorophyll-bearing 
tissue. 
Fig. 2. — Longitudinal section of leaf. X 233. 
Section taken thru chlorophyll-bearing bundle sheath, a, upper 
epidermis, b, lower epidermis, c, chlorophyll-bearing tissue of 
leaf, d, portion of chlorophyll-bearing bundle sheath. 
Fig. 3. — Longitudinal section of leaf thru vascular strand. X 233. 
a, upper epidermis, b, lower epidermis, c, d, chlorophyll-bearing 
tissue, e, phloem. /, xylem elements of bundle, g, h, chlorophyll- 
bearing bundle sheath. 
Fig. 4.— Cross section of leaf. X 233. 
a, upper epidermis, b, lower epidermis, c, chlorophyll-bearing 
tissue, d, chlorophyll-bearing bundle sheath, e, phloem. /, xylem. 
g, stoma, h, air space below stoma. 
Fig. 5. — Cross section of leaf showing connection between vascular strands. 
X 233. 
Fig. 6. — Cross section of one of larger leaf bundles. X 233. 
