



4 - 



OF THE OVULE AND SEED-COATS OF MAGNOLIA. 



109 



t'.. 



■A -'-' - 





-I , 



the nucleus of an unimpregnated ovule, 

 inner lining of the primine at this time har 



r 



except in their smaller size. Fig. 12 re- 

 presents an impregnated ovule, or form- 

 ing seed, of about a line and a half in 

 length; its natural size is indicated by 

 the perpendicular line at the right of the ^ 



forming 



ure 



turned 



wards the eye, appears more 



nature 



I 



— a 



"•a 



-A 



^"^^*^ ^ ^ -~ A* m* ** ^^ 



Fig. 12. 



Fig. 13. 



.P '' J 



cept when the body is a little 

 withered; it is then as con- 

 spicuous as is represented. 

 Fig, 13 is a magnified vertical section of the same, answering to 

 that of fig. 9: a, the primine, or outer seed-coat; a\ its inner 

 lining: assuminsr a different texture and appearance; &, the se- 



cundine or inner coat, abeady beginning to adhere slightly to the 

 nucleus c. On the other side, d is the cord of vessels of the 



ra 



and extendin 



^ ■ ... 



I * 



r f ^ 



>l 



■;.> 



^ --!./ 





'■-' >. 



■3 



^ u 



.1 . -^ _ 



1 r- 



f ■■ 



^^ 



J J 



H - h 



nucleus, sufficient- 

 ly magnified to re- 

 veal the structure, 

 is shown in fig. 14, 

 the parts of which 

 are corresponding- 

 ly lettered. The 



.-! 



> ' '-*■ r 



a. 



-I 



Fig. U 



■ 



with some forming pleurenchym 



found 



narrow horizontal cells (a') 



loping 



inner 



-> 1- J 



^ \ 





Ul 



fc" ■ ■ ■ 



r 





'>.- 



■^r?;^. '*■' 



> ^ ^ 

 >^^^^^ 



H=-r 



I' J ■ . 



d-'-r- 



, 4 



h ^ 



Fig. 16- 



tf 



Fig. 15 



Fig. 17 



> 



■-' w 



■^;' 



Our next stage 



exhibits the see^ almost fuU-grown, and of the 



^ F 



*V*-^ 



-4 



^ h 



■ _ "iJ 



;v^vliv,--. .-v..- :-■■■ ■-■■^ -^..■;, ^-V: :^;-:. -/-v.. ,■.,:., ■■..■^.v;.:-- ;■ . ., . ■. 



_H -■- 



^ " J ■ 





i, 



I .1 



Th JjC 1^ 



N'i^ 



¥ ^ 



.-tr= 



V. - - ±r :-' 



H - "1 







.A 



"-1 ' 



: *r "^ ^?.^ 



- ^ ^ 



^ ^'p 





