122 JOURNAL OF THE ARNOLD ARBORETUM [vol. v 



ULMACEAE 



Ulmus americanaL. Found in the valley and more rarely along ravines 

 and ledges on the mountains, but nowhere common. 



Ulmus fulva Michx. Comparatively rare on bluffs and steep slopes. 



Ulmus alata Michx. This is the commonest elm of the area, and is 

 found both in the valley and on the mountain tops and more rarely on 

 the slopes. 



Celtis laevigata Willd. Rarely found in the valley along Big Creek. 



Celtis laevigata var. texana (Scheele) Sarg. A few specimens of this 

 southwestern form were seen in the valley near Page. 



Celtis pumila Fursh. This shrubby species is occasionally found on 

 exposed slopes and ledges on the south side of the mountains. 



Celtis pumila var. georgiana (Small) Sarg. This form, with pubescent 

 leaves and branchlets, grows in similar situations to the last. It is here a 

 slender straggling shrub, seldom more than one to two meters tall. 



MORACEAE 



Morus rubra L. The Mulberry is found sparingly in the rocky valley 

 and on the lower slopes of the mountains. It was not noted on top, 

 although it may perhaps occur there. 



LORANTHACEAE 



fl 



Q 



Confined to the valley and 



genera. 



Men 



MENISPERMACEAE 



spermum canadense L. Found in thickets in the valley and in 

 coves on the north side of the mountain, but nowhere abundant. 



Cocculus carolinus (L.) DC. Sometimes frequent in thickets in the 

 valley. 



MAGNOLIACEAE 



Magnolia acuminata L, The Cucumber tree is found along the rocky 

 banks of Big Creek in the upper part of the valley. On the Arkansas side, 

 it extends to the top of Rich Mountain. Farther west, in Oklahoma, it 

 is confined to the steep north slopes of the mountain, but there it is often 

 abundant and of maximum size. 



Magnolia tripetala L. The Umbrella tree was observed only towards 

 the east end of Rich Mountain, in Arkansas, where it grows in coves and 

 on rich north slopes. It is not improbable that it may occur somewhere 

 on the Oklahoma side of the line, although we have no record of it. Speci- 

 mens distributed under this name by G. W. Stevens, from Page, Oklahoma, 



which I have examined in several herbaria, are all of the preceding 

 species. 



