120 JOURNAL OF THE ARNOLD ARBORETUM [vol. v 



Carya oralis var. obovalis Sarg. This form is rare, if found at all in the 

 valley, but is more abundant on the north slopes of the mountain. 



Carya Buckleyi var. arkansana Sarg. This species is the commonest 

 Hickory of the valley and lower mountain slopes, but is less abundant at 

 higher levels. 



Carya alba (L.) K. Koch. A common species both in the rocky valley 

 and on both sides of the mountains, extending to the top, where it is not 

 infrequent but of smaller size. 



Carya alba var. ficoides Sarg. It is interesting to find this form, with 

 its very distinct fruit, not infrequent on the north slopes of Rich Moun- 

 tain. It was originally described from a single tree in Southwest Missouri. 



stations 



BETULACEAE 



Betula nigra L. The River Birch grows sparingly along the margins of 

 Big Creek. 



Carpinus caroliniana Walt. This species is confined to the valley and 

 lower slopes, and is most frequent along the rocky banks of the creek. 



Ostrya virginiana (Mill.) K. Koch. A common small tree in the rocky 

 valley, and more or less abundant on the slopes and top of the mountain. 



Alnns rugosa (I)uRoi) Spreng. A common shrub along the rocky 

 barks and bed of Big Creek, and sometimes found along its small tribu- 

 taries as thev descend into the vallev. 



FAGACEAE 



Castanea ozarkensis Ashe. The Chinquapin of the Ozark region, which 

 has recently been described under this name, appears to be sufficiently 

 distinct from the eastern and southern Castanea pumila, with which it 

 has long been confused. However, there is much variability in the size 

 and toothing of the leaves, as well as in their pubescence, and in the size 

 and shape of the nuts, and I can see no justification for distinguishing 

 in this region, as the author has done, a second species (Castanea arkan- 

 sana Ashe) with densely prickly involucres. This species is not rare on both 

 slopes and on top of the mountains. Here, as elsewhere, it grows usually 

 as a large arborescent shrub, but occasionally as a tree with a single trunk 

 and with a maximum height of eight or ten meters. 



Castanea Margaretta Ashe. On top of Rich Mountain, above the station 

 of the same name, in Arkansas, a Chinquapin was collected in fruit, having 

 involucral spines sparse and remotely set, and appearing to agree generally 

 with description of this species, to which it is rather doubtfully referred, 

 as I know little of it. 



Fagus grandifolia var. caroliniana (Loud.) Fernald & Rehder. A few 

 trees of this Beech were found along the creek a short distance east of 

 Page. It was not noted elsewhere on the mountain slopes in Oklahoma 

 but is not rare in the vicinity of Mena, Arkansas. 



