244 Muhlenberg's observations on the 



or less oval, but easily distinguished from the 

 others by their four edges. Another distinguish- 

 ing character is the wool covering the under sur* 

 face of the leaves, their stalks, and peduncles. 

 This species might be called J. villosa.* 



4. Juglans compressa. This approaches to the 

 foregoing, but may easily be distinguished by its 

 bark being very much furrowed and ridged. 

 The leaves and their stalks are pubescent, as are 

 also the young branches. The hut is very well 

 represented by Gaertner under the name of 

 J. compressa. In this country it is known by the 

 name of Shell bark, and sold in the markets. I 

 cannot believe it to be the same with J. ovalis of 

 Wangenheim, but it certainly is J. ovata of 



* Li n nteu s, as Is proved by the authors he has quoted, has brought 

 several species under his Juglans alba, considering themi as varieties, 

 •which, however, is contrary to experience. It is difficult to decide, 

 which is his original J. alba. It appears to me most probable, that he 

 means the same described by Kalm in the Transactions of the Swedish 

 Academy for the year 1769, which also corresponds with Mr. Muh- 

 lenberg's J. alba. As the Hickery species are but little known, I 

 shall attempt giving the specific characters of those which were examined 

 by me. 



J. alba: foliolis septenis oblongis acuminatis subtus pubescentibus 

 ocabris, fructibus sub-quadrangulis laevibus. 



