Explanation of the Plates. 



n, extranuptial nectary; e, epidermal cell; c, crown cell; st, style 

 cell ; h, basal cell ; p, parenchymatous cell ; cr, crystal cell ; sc, secretory cell ; 

 8uhg, snbglandnlar cell ; fh, fibro-vascular system ; is, intercellular space; ch, 

 chlorophyll grains ; 



D. II, D. Ill, F. II, &c., Lenses of Zeiss microscope. 



Plate I. 



Fig. I. Polygonum sadialinense. a, stem ; h, longitudinal section of the 



nectary ; c, the same as h. 

 Fig. II. Ipomoea Batatas, a, young leaf; h, glandular papilla of the 



nectary ; c, origin of veins on the leaf. 

 Fig. III. Polygonum multiflorum. a, stem; h, glandular papilla. 

 Fig. IV. Polygonum cuspidatitm forma Meigetsuso. 

 Fig. V. Syringa «TO^r/•e?^s^6■ var. vzY^osz«??. a, lower surface of the leaf; h, 



longitudinal section of the nectary. 

 Fig. VI. Osmanthus aquifolmm. a, lower surface of the leaf; h and c, 



longitudinal section of the nectary. 

 Fig. VII. Urena sinuata. Lower surffxce of the leaf; b, longitudinal section 



of the nectary ; c, glandular hairs. 



