' 





* 



LEAF NECTARIES OF GOSSYPIUM 



E. L. Reed 



(WITH PLATES XII AND XIII AND ONE FIGURE) 



■ 



On the midrib and sometimes on the other principal veins on the 

 underside of leaves of Gossypium, certain nectar glands are found. 

 All species of cotton, with the possible exception of G. tomentosum, 



w 



t 



*-. 



! 



Fig. i.— Nectar gland on a leaf of Gossypium hirsutum 



possess these glands, which are usually oval or pear-shaped, some- 

 times even sagittate in form. Taylor (i) says "these gland 

 are usually small, rounded, shallow pits, with a floor of round- 

 topped secreting cells"; and Watt (2) states that "these midrib 

 lands may be elongated and elevated portions of the veins that 



Or 



2 29] 



Botanical Gazette, vol. 63 



