A Botanical and Economic Study. 201 



EXPLANATION OF PLATES. 

 Illustrating Dr. John W. Harshberger's paper on Mai 



PLATE XIV. 



Wild Mexican Plant grown in Philadelphia. Shows terminal pendu- 

 lous male panicle and contracted lateral branch, with ears set alternately 

 upon it. In the axils of other leaves, as shown in the plate, ears are 

 developed. Size of full-grown plant, five feet. 



See Cornell Agricultural Experiment Station Bulletin | Bui. 49, Dec, 

 1892. p. 332) for photograph of a plant with fully developed lateral 

 branches with tars set upon them, each branch terminated by a small 

 male tassel. 



PLATE XV. 



Details of Gross Anatomy. 



Fig. 1. Branch of male panicle showing spikelets. 



Fig. 2. Paired spikelets removed. 



Fig. 3. Male spikelet dissected showing two flowers. 



Fig. 4. Cross plan of male spikelet with pollen below. 



Fig. 5. Dissection of pointed grain of Mexican corn. 



Fig. 6. Sprouted grain. 



Fig. 7. Lateral branch with husked ears. Front view. 



Fig. 8. Lateral branch with husked ears. Back view. 



Fig. 9 Branch with alternate arrangement of ears. Husks removed. 



Fig. 10. Ideal longitudinal section of a portion of an ear with female 

 spikelets in a hardened depression of cob with ovary, glumes and palets. 



Fig. 1 1. Cross plan of female spikelet, showing empty flower. 



Fig. 12. Cross plan of lateral branch with four ears. Husks, or leaves, 

 lettered in order from base of branch to top. 



PLATE XVI. 



Histology. 



Fig. 1. Cross section of secondary root. 



P. Phloem patches. 

 Fig. 2. Longitudinal section of emerging secondary root [i. e. aerial . 



C. Calyptrogen layer. 

 Fig. 3. Cross section of leaf. 



S. Stereome. 

 Fig. 4. Cross section of leaf-blade near margin. 



B. Pulliform cells. 



