213 



ash trees of the species. Instead of this, a long search failed to 

 reveal anything of the kind elsewhere, and scores of surrounding 

 trees were examined. The nearest approach was the abnor- 

 mality found in a very rapidly growing leaf upon a young sprout 

 from a stump of a recently cut ash tree. In this the terminal 

 leaflet had one leaflet of the first pair below united with its base. 



The leaf to which atten- 

 tion is specially called is 

 shown much reduced in the 



In 



accompanying outline. 

 this, instead of the single 

 extra leaflet in the basal pair, 

 there is a lateral leaf- stalk 

 which bears three leaflets in 

 the same manner as in the 

 upper portion of an ordinary 

 ash leaf If this abnormal 

 portion had elongated far- 

 ther and formed another pair 

 of leaflets, there would have 

 resulted a symmetrical leaf 

 of a peculiar dichotomous 

 type, and its origin might 

 have been a matter of conjecture. 



In the present instance it may be assumed that the tissue 

 which ordinarily goes to make up a single leaflet has divided into 

 two in each case where an extra leaflet is produced. In the ex- 

 traordinary abnormality, last mentioned, it may not be difficult 

 to see that a lateral leaflet has followed out the method of growth 

 of the terminal leaflet and divided its blade into three nearly 



equal parts. 



Byron D. Halsted. 



Kansas Botanical Notes- 



In a recent brief collecting tour (beginning May 28th) ex- 

 tending as far west as Greeley County, within about fifteen miles 

 of the Colorado line, one of the first things to attract my atten- 



flower and fruit 



pinnatifidi 



A large number of butterflies was noticed on 



