'9°9l 



BARBER-FRUITS AND SEEDS OF CUCURBIT ACEAE 



3° 7 



on, is extremely narrow, with a globular enlargement just without 

 the center, the two ends branching and running into pits at the outer 

 and inner tangential walls. In tangential section the polygonal cells 



are 30-45 ^ in diameter. 



4. Parenchyma (p).-A number of layers of large stellate cells form 

 the spongy parenchyma. All the walls are thin, the cross walls being 

 pierced with pits. In the outer layers the walls are sclerenchymat.zed. 



5. Inner epidermis. -This layer of small parenchyma cells is also 

 somewhat stellate. 



til 



(Jig. 47, N) , ENDOSPERM [fig 



Abobra viridiflora Cogn. 



2 



mm 



The seed of Abobra viridiflora Cogn. (fig. 48) is 7~* am tong ' V ^ 

 slightly flattened, the enlarged apex being 2- 3 mm broad and 1 . 5- 

 thick, of a deep-brown color with 

 longitudinal dashes of a darker 

 brown. 



Spermoderm (fig. 49). 

 but firm. 



Ep 



Thin 



P) 



—The pali- 



ade epidermis varies in thickness 

 from 16-45 A 4 - On the thick radial 

 vails of the larger cells are one or 

 more straight rods joining the outer 

 wall, which is extremely thick. 



bepidermal layer (sub). — 



2. 



six to 



This broad layer, __._ „ 



te » cells thick, consists of 



ver X thick-walled, pitted 

 cells 



irre 



gularly arranged. 

 The outer, and frequently 

 the in ner, cells are small, 

 bu t the middle ones are of 



48 



Fig. 48. Abobra 



viridiflora Cogn. Seed. 



Seed 



Vl _fic 40 Abobra viridiflora Cogn. 



tL S spermoderm consisting of 



in cross-section. ^, sp er " 



* epidermis, »* subepidermal layer, sclscKr 



enchyma, />, parenchyma. 



.V, perispenn; 



enormous size. Few or no <™ h >™' * *™2Z ™* *«*"•«* 

 *reell„ lar space s are ^£^ SS * *«— •— 



present. 



X160. 



