

BARBER-FRUITS AND SEEDS OF CUCURBIT ACEAE 



3°9 



4. Parenchyma (p) 



—Several layers of thin-walled parenchyma 



form 



derm. Only with high magnification can the pits in the outer layer 



be seen. 



P 



As in the other species, this tissue consists 



of a single layer of thin-walled 



cell-. 



(fig. 5h N) 



ndosperm (fig. 51 , E), and 



EMBRYO (fig 



correspond 



with the general description. 

 Trichosanthes colubrina L. 



ot 



The seeds are 15 

 nm broad, and 4-5 



mm 



long, 

 thick, 



a gray-brown color. The 



mm 



irregular contour and beautiful 



dark markings on the flattened 



Jriace are illustrated by fig. 52. 



-A 



*ry hard and thick seed coat with 



Spermoderm {fig. 53). 



\ 



too distinct subepidermal layers 

 8 characteristic of this seed. 



I. Epidermis {ep).— This layer 

 •sverv irregular in width (12-135 

 H' The larger cells 

 d °wn into grooves of 



h « second layer, bear 



tf aight rods on their 

 radial walls. These 



' 



running 



rod 



join the thick- 



ened °uter wall and in 

 "oss-section are indis- 

 H'uishable from the 



52 



TtvJ&J 



53 



Fig. ^2 



-eed. Xi 



Fig., 53. 



,„ Trichosanthes colubrina L ^ 



Trichosanthes colubrina L- ^e 



of ep, epidenm 



Walls 



at the angles. 



section; S, spermoderm «•**»* o , ^ 



sub*, outer and sub*, inner subq»«kr 



■V, 



Ul of the walls 

 ,m P r egnated with 



are 

 a 



with R, ra l )he: 



sclerenchyma, p, P arencn v° rotv i e( lon with ep, ep»- 

 perisperm; E, endosperm; c ; ^; >7 aleurone grains. 



dermis, and mes 



X160. 



parenchyma 

 idosperm; C, ---,-- , 



.ophyll containing al, aleuron 



