258 Muhlenberg's observations on the 



below, and perhaps belonging to C^ discolor, or 

 else to the following species : * 



G. Grund-Eiche?i(GrQund oaks) I call such which 

 are constantly of a dwarfish size. They delight in 

 situations exposed to the sun and dry ground. 

 When intermixed with large trees, they die, being 

 impatient of shade. To this division several oaks 

 are referred not properly belonging to it: Quercus 

 alba pumila becomes lofty, as also does Quercus 

 prinus humilis. The only one in this country 

 which I always found small-sized, is 



1 4. Quercus rubra nana of Marshall, Q^ ilici- 

 folia of Wangheneim and Willdenow. This 

 species is pretty well known in Europe. Whether 



* Quercus aquatica Hort. Kew. certainly contains several species de- 

 scribed by Wangenheim, which deserve to be more closely examined. 

 The above mentioned with leaves cottony below, and which Mr. 

 Muhlenberg takes to be Q^ discolor Hort. Kew. is a non-descript. 

 I define it : 



<3>. ihngata : foliis trilobis subtus tomentosis, lobis divaricatis, inter- 

 nievlio duplo longiore trifido, apice setaceo-mucronatis. 



The leaves are very distinctly divided into three lobes, the middle of 

 which, being subdivided into three smaller ones, is double the length of 

 the two lateral ones, which form right angles. Lower surface of the 

 leaves cottony; upper surface dark-green, shining. The flowers and 

 fruit I had not an opportunity of examining. W. 



Is it Q^falcata of Michaux ? T. 



