COMPARATIVE ANATOMY OF THE CUCURBITACE^E. 



21 



Charantia, Trichosanihes japonica, T. mitUiloha aiul Gymnoslemma 

 rUsoides, in wliieh tlie trichomes on the iiiulcr-suifacc are borne 

 only uj)on the veins. Actinostemma racemosum lias them only 

 upon the veins on both the upper and lower surfaces. 



The following- are the average numbers of the trichomes on 

 the upper surface of the blades, omitting those species in which 

 the trichomes grow only upon the veins : 



Lagenaria ndyaris 



Oiicurbita Pepo 



Trichosanihes cucumeroifhs 



Liijf'a cylimh'ica 



Jlcloihrla japonica 



Oiicuinis sativus 



Benincasa cerifera 



Cacumu Jlelo 



Luffa acutangula 



Trichonan the s japon ica 



T. multiloba 



Schizopepon hryoniœfolius, rar 

 japonicus 



Citru litis vulgaris 



Jlovi.ordica C 'Ii a i •« n t la 



Ggjnnostcin ma cissoides 

 The average numbers of the trichomes on the under-surface 

 are as follows, again omitting the species in which they are borne 

 only upon the veins : 



Cucurbita Pepo 80 per s(p mm. 



Lagenaria vulgaris 52 ,, 



Trichosanihes cucumeroides 52 ,, 



Beyiincasa cerifera 28 „ 



