2 8 2 BOTANICAL GAZETTE [awl 



form. The rind is i cm thick surrounding the central mass of fibers 

 which do not break down. A cavity is formed, but it is not so evident 

 as in the other species of this genus, since the tissues, although separat- 

 ing, retain their original position. 



The seeds are of the usual type for this genus. 



Pericarp.— The layers are essentially like those of the variety 

 verrucosa, having a wavy-walled epicarp, thick-walled hypoderm. 

 outer mesocarp of stone cells with the characteristic cavities and large 

 spherical cells, middle mesocarp with starch, etc. 



Spermoderm.— The lavers are similar to those already described. 



C. Pepo var. orangina Ser. 



The fruit of this variety differs from that of the type only in macro- 

 scopic appearance, having the size, shape, and color of the orange. 

 Rigidity is given the thin rind by the outer mesocarp of stone cells. ^ 



The small seeds are histologically like those of the precedir, 



vanetv. 



CUCURBITA MAXIMA DUCH. 



This species (winter squash) is a native of southern Asia and, i c 

 C. Pepo, has many varieties differing in size and shape. 



The fruit, the largest of the family, varies from 15 tooo cm * eng^ 

 It is rounded ovate, with warts and occasional lon ^ tud ^l^ u , 

 and is of a yellow, orange, or green color. In the so-called 



/ * wtt j uiui *6 v ' o*^^ . .. Ufip or con* 



variety, the top of the fruit projects beyond an encircling > ^ 

 striction, which marks the margin of the adherent receptai -e. 

 hollow rind with central cavity is filled with bundles and see s. ^ 

 The white seeds are 1.5-2. 5 cm long, smooth, and flatten 



a b0rder ' + r Pepo a^ I 



Both fruit and seed closely resemble in structure u r 



varieties. 



elerene 



-hv- 



PERicARP.-The thin epicarp, small-celled ^^'jf^ol 

 matized outer, thin-walled middle, and inner mesocarp are 

 C Pepo var. verrucosa (fig. 7). and tha t of 



Spermoderm.— The chief difference between this cm ^ enc]ivrn3 . 

 the species already described is in the middle spongy pa 

 which in this seed is five to six cells thick. 



