1923] 



Bau: Morphological Characters in Crepis Capillaris 



229 



Position of Capitulum upon the Plant as a Factor 



The position of the capitulum cannot always be categorically sep- 

 arated from the influence of age of plant. Two distinct facts, however, 

 are involved in this group. The first is the position of the capitulum 

 with reference to its origin, which may be in the axils of the lower 

 or the upper leaves or in the terminal cyme. The second is the 

 position of the capitulum with reference to the cyme itself of which 

 it forms a part. Figure 3 shows a diagrammatic representation of 



Fig. ii. — Diagrammatic representation of the inflores-cence in Crepis capillaris. 

 Numbers indicate diameter of capitula of a single plant measured in centimeters. 



