4 ART. 3. K. ONO. 



with the epidermis lie flattened basal cells, the number of which 

 corresponds to that of the style cells. Adjoining the basal cells 

 is the small-celled parenchyma, which is composed of only two 

 or three layers of cells. The fibro-vascular bundle shows no direct 

 connection with the nectarine tissue. 



The crown is the true secretory epithelium, and the cells 

 are filled with granular protoplasm, with numerous vacuoles 

 which are rich in grape sugar. The style cells, on the contrary, 

 contain little protoplasm with very large vacuoles, and a distinct 

 nucleus. The basal cells, like the crown cells, are rich in plas- 

 mic contents and have a large and distinct nucleus. Fehling's 

 solution gives copious brown precipitates i]i the cell. 



The above description of the structure of the extranuj^tial 

 nectary is applicable also to the case of Polygonum cuspidatum}^ 

 and P. multiflorum. 



Ipomoea Batatas has also similarly constructed extranuptial 

 nectaries, which are situated on the under surface of the leaves 

 along both sides of the origin of the leaf-veins. Here wo see 

 only one broad style cell and two basal cells in a papilla. 



b. Osmanthus aquifolium. 

 The extranuptial nectaries are found on the under surface 

 of leaf-blades, and are composed of a multitude of minute gland- 

 ular papillae. The crown consists of two small cells and the 

 style of a single cell only. The side wall of the style cell 

 is remarkably thickened and cutinised forming a stout ring 

 around the papilla so as to support the crown. The base is 

 formed of two small cells which are rich in contents. There are 

 several non-secretory papillae, intermingled with the glandular 



1) Morini. 1. c. p. 40. 



