830 THE AMERICAN NATURALIST. [Vol. XXXVIIl. 



42. In rare cases, however, plants were found which had the 

 first leaf with three teeth. In the specimen {Fig. 41), the first 

 leaf was simple like one of the first nepionic leaves shown in 

 Figure 38; the second was three toothed like the first nepionic 

 leaves of the typical seedling (Figs. 37 and 40), and the third 

 leaf has five teeth as was so commonly found as the first stage 

 from rootstocks in the early spring growth. This then is a very 

 retarded individual and repeats in its localized development, all 

 the main stages seen in the whole series of seedlings representing 

 the direct development. 



Beneath the flower reduced leaves are also found. At the 

 junctions of the stems of the compound corymb, leaves are found 

 which are like those of the early spring growth and seedling in 

 that they are simple and but few toothed. At the upper portion 

 near the ultimate branchings are found leaves with five and 

 three teeth and in some cases, simple entire leaves. These 

 leaves are seen to repeat the same stages as in the localized 

 development shown in spring growth and in the direct develop- 

 ment of the seedling but in the reverse order. It is still another 

 case of the localized reversionary senescence already referred to. 



(Whi 



Michx. 

 e Wood-c 



species was not obtained but a compari- 

 son of the early spring growth of an 

 adult plant with the portion below 

 the flower heads shows striking simi- 

 larities. The stages are very simple, 

 varying mainly in the number of the 

 lateral teeth. 



In the early spring growth of a 

 plant a year or more old, the radical 

 ■ur acumi. ^^^^'^^ are at first entire and some- 

 ti'e stages what spathulate (Fig. 43). The ne.xt 

 leaves have two lateral teeth and 

 succeeding leaves have two lateral 

 n further development three lateral pairs are 



