LOCALIZED STAGES IN DEVELOPMENT. 



103 



the form of the first nepionic leaves of the seedling. Such seems to be the case usually 

 in paripinnate leaves as well. Besides the cases noted numerous confirmatory cases may 

 be seen by looking over Lubbock's Ijook ('".'2) on seedlings. In plants where later leaves 

 are radically different from the seedling, as in many acacias, cactuses, etc., of course this 

 parallelism would not hold true. At least occasional exceptions occur, however, as in 

 Seshania tomentosa Hook, and Arn., figured by Lubbock ('92). Li this type the first 

 nepionic leaf is simple, but later leaves are paripinnate. 



In twice compound leaves of the Honey Locust frequently a single leaflet takes the 

 place of a compound leaflet, evincing a reversionary character. 



EucHARiDiUM GRANDiFLORUM. The Seedling of Eucharidium grandifloruni Fisch. and 

 Mey., as described by Lubbock ('92), presents a graphic case of the change in the form 



ErCIIARlDIUM ORAXDIl I.OKCjr. 



1. Seedling, X 3. 2. The same, ten days after germination, X 3. 



3. The same, showing final form of cotyledons and succeeding nepionic leaves, XI- c. = cotyledon. 



