44 



autumnal or of mid-summer; .some jjlants have exclusively 

 but one series, some only the other, while many, like the 

 Coleus, combine both kinds. 



In Plantago lanceolata the tips of the green sepals, and in 

 Dandelion the tips of the involucre, l)ecome an inky i)urple. 



An example showing the constitutional nature of color is 

 furnished in a purple variety of Norway maple. In the 

 seedling plant the first pair of leaves is green, but the stem 

 and second pair is reddish-pur[)le, and this last color slightly 

 modified may be seen in the full grown tree, in its winter 

 buds, leaves, leaf-stalks, peduncles, sepals and style. The 

 flower therefore, instead of being wholly green as in the 

 common variety, is of a brick-red color, although the petals 

 retain their greenish hue. There is no doubt as to the 

 sequence of color here from the cotyledon leaves of a green 

 color to the next pair purple ! One may go a step farther 

 and examine the stem of the yellow fiowered Caltha paluH- 

 tris just below^ the surface of the ground, and find it colored 

 a beautiful purple, which color developes before the chloro- 

 phyl-green ! 



Another example of the fiower color pervading the whole 

 plant may be seen in Phytolacca decandra, the pokeweed ; 

 its peduncles, bracts and petal-like sepals are a pink-purple : 

 the entire stem becomes red, and the berries change from 

 sreen through red to black. 



