U/.UO.V ROADSJUE PLANTS. 



823 



are really reduced leaves as they are the morphological equiva- 

 lent of such. Figure 10 is, in the number of its main divi- 

 sion, comparable to the first nepionic leaf of the seedling (Fig. 

 3), and to leaf 3 of Figure 6 in the early spring growth. It dif- 

 fers however in not showing secondary^ lobes as seen in the other 

 cases. Leaves of the next succeeding whorl have five main 

 lobes, Figure 1 1, comparable to leaf 2 of Figure 6, or to leaf 5 

 of Figure 4. The one shown in Figure 12 is comparable to leaf^ 

 3 of Figure 4, or to the second stage in early spring growth. 

 Figure 1 3 shows the ultimate reduction and a simple leaf com- 

 parable to the simplest first stage of spring growth. This series 

 below the flower repeats in the reverse order, the steps shown 

 in the progressive localized development of early spring growth 

 and in the' direct development of the seedhng. In other words, 

 it is regressive development repeating progressive development. 



Figu 



i-i6. 



(Wild Indigo.) 



shows localized stages in a simple manner, yet very 

 completely. In the direct development fre- 

 quently starts off with the first nepionic leaf 

 simple, broad and rotund, distally 

 the stipules not large but m 

 able (Fig. 14). The first leaf is 

 broader and more rounded than 

 the type leaf of the species (Leaf 

 I of Fig. 16) in which the tip is 



; slightly null ' ^ 



marginate, 

 ertheless 



slightly 



The 



^ ond nepionic leaf i^ trifoliolate, 

 SonictaveTthe ^ the leaflets rounded, wedge- 

 oStStbtr"" obovate. The succeeding leaves 

 on trifohoiate. trifoliolatc, thc stipules 



becoming smaller and less persistent. 



Comparing these stages in direct development^ 

 with localized stages in development seen 



arly spring growl 



