102 THE AMERICAN BOTANIST 



species which have the trick of producing two or more forms 

 of leaves on the same plant and often on the same twig. The 

 sassafras is the classical example of this. Besides leaves with 

 entire margins which it hears in common with its cousin the 

 spice-wood {Benzoin), it also produces "mitten-shaped" 

 leaves in which there is a projection or lobe on one side. 

 Frequently still another lobe is borne on the opposite side. 

 The mulberry usually has leaves that are lobed in a similar 

 manner and the white poplar produces leaves that range from 

 ovate and entire to three lobed. The honey locust (Gleditsia) 

 regularly produces both pinnate and twice pinnate leaves. On 

 the other hand, several species, which have normally pinnate 

 leaves, notably the black locust and the mountain ash, may 

 now and then produce specimens with simple leaves. The 

 orange is well known for having a blade that is joined to the 

 leaf stalk in such a way as to indicate that it is not a leaf but 

 a leaflet — all that is left of a once pinnate leaf. In this con- 

 nection the leaves of the golden leaf oak or white live oak 

 (Quercus chrysolepis) shown in Mir illustration will be of 

 interest. The forms shown were all taken from a single twig 

 sent to us by Mr. L. E. Smith of Sisson, California. Mr. 

 Smith writes that this is a commi n tree along the Sacramento 

 river. The leaves seem quite analagous to those of the new 

 form of shingle oak mentioned in a recent number of this 

 magazine. 



In Forest Leaves for April an illustration is given of a 

 form of the shingle oak which has lobed leaves and which is 

 regarded as a hybrid between the shingle oak ( Quercus iui- 

 bricdria) and the pin oak (Quercus palustris). The shingle 

 oak frequently forms hybrids with other oaks, and it is pos- 

 sible that the specimen reported by Air. Bates in this magazine 

 for November, L917, as Quercus imbricaria heterophytta may 

 lie the same species. 



