232 BIOLOGY. 



secretes in itself electrical, inflammable bodies, and is 

 directed towards the sun. 



1184. The difference between corolla and pistil is 

 that of the two principal tissues, the tracheal and cellular 

 tissue. By the light the tracheal fasciculi become finally 

 separated from the cellular substance, evolved to a higher 

 degree as the child or product of light, and planted 

 outwardly. The corolla is the tracheal circle, which has 

 forcibly gained its freedom. 



1185. The pistil is the vascular substance that has 

 become freely evolved, yet to the highest stage ; in a 

 similar relation likewise does the seed stand to the cellu- 

 lar substance. In the fruit therefore the flower again 

 reverts to the primary condition of the plant. 



1186. The flower and pistil are therefore those very 

 organs which have been most antagonized in the plant. 

 They are in the highest state of polar tension, and stand 

 opposite each other like electrism and chemism, or as 

 light and matter. This antagonism in the Organic is 

 called sex. 



1. FLORAL ENVELOPES. 



1187. The blossom is the leaf-formation, in which the 

 separation of the principal tissues is completely attained, 

 where the tracheal fascicles entirely separate from the 

 cellular substance, and become a leaf with free ribs. 

 The cellular substance becomes the corolla-petal, the rib 

 the stamen. 



1188. The blossom passes through the three stages of 

 leaf-varieties before it attains its completion, and divides 

 therefore into three whorls, which correspond to the root- 

 leaves, stalk-, and ramular or perfect leaves. The radical 

 or squamose leaf appears in its repetition as involucrum 

 or spatha. The stalk or vascular leaf as calyx. The 

 perfect or tracheal leaf as corolla. 



a. Involucrum. 



1189. As the root puts forth numerous branches, so 

 the involucrum or spatha frequently incloses many 



