STUDIES OX S03IE EXTRANÜPTIAL NECTAKIES. 5 



papillae. The non-secretory papilla is composed of a set of long 

 cells, which have a thick, cutinised outer wall, but contain no 

 protoplasm. 



Syrinya amurensis var. villosa is remarkable for its having 

 the style cell often divided by a tangential wall into two parts, 

 the papilla consequently being somewhat elongated. The necta- 

 ries of Liyiistrum medium, L. clliatum and L. lac'idum^^ belong 

 to this type. 



c. Urena slnuata. 



The nectary is found on the prominent midrib and has a 

 structure similar to that of Hibiscus tiliaceus.'^ The glandular 

 papilla has only one style cell and two basal cells, and the bundle 

 of crown cells is elongated in the vertical direction forming on 

 the whole a kind of multicellular glandular hair. 



Ipomoea pcmiculata^^ and Erythrina Constayalli^^ are known 

 to have a similar structure. 



d. Clerodendi'ontrichotomum, Diervilla yrcmdifloray Callicarpa 

 japonica, Tecoma yrandiflora, Catalpa Kaempfevi, 

 Pauloiunia tomeiitcsa. 



The extranuptial nectaries of this group differ from the 

 foregoing type, and even among them some structural differences are 

 to be noticed. These nectaries originate from a single epidermal 

 cell, and develop into a complex form by a repeated division of 

 that single cell. It may be remarked, that there exists a striking 

 resemblance between the structure of the nectaries of this type 



1) M r i n i . 1. c. p. 38. 



2} Mori 11 i. 1. c. p. 44. 



3) Ew art . On the leaf-glaiids of Ipomoea paiiiculiita. Ann. of Kot. Bd. IX, p. 175. 1S95 



4) Morini. I. c. p. 45. 



