COMPARATIVE ANATOMY OF THE CUCURBITACE^. 33 



CHAPTEE VI. 



THE TENDRIL. 



Contour, The contour of a transverse section through the 

 proximal portion of a tendril is nearly circular. In the more 

 remote portions it takes a more or less polygonal shape, and at 

 the distal portion it becomes flattened. Especially in Luffa 

 acutangula and Benincasa cerifera the surface of the main axis 

 of the tendrils is elevated into noticeahle longitudinal ridges. In 

 Benincasa cerifera (PI. IV. Fig. 50), Cucvrhata Pe^^o, Luffa 

 aciUangida and Schizopeiwn hryoniœfolius, var. japonicus a central 

 hollow is formed in the main axis of the tendrils. 



Stoniata. The average numbers of the stomata on the 

 tendrils are not widely different in each species, as may be seen 

 from the following table: 



Triclwsanthes cucumeroides 



T. japonica 



T. multiloba 



Gymnostemma cissoides 



Actinostenima racemoswn 



Melothria japonica 



Luffa cylindrica 



L. aeiitangida 



Benincasa cerifera 



Momordica Charaiitia 



Oitrullus 'vulgaris 



