142 JOURNAL OF THE ARNOLD ARBORETUM [vol. ii 



Quercus Shiimardii var. SchnecJcii (Brilton) Sarg. A fine large species 

 along })luffs and hillsides. Ratlier frequent in the Mounds Formation 

 and Ozark region, and occasionally found on the higher ground in the 

 Cairo Formation. 



Q 



A common Oak in the uplands of the Ozark 



it in the Mounds Formation and spar- 



ingly found in the Cairo region. 



Quercus borealis Michx. f. var. maxima, A fine species, and one of 

 the conunonest Oaks in the Mounds Formation. In the Ozark region 

 it is confined to the vicinity of rocky bluffs and hillsides. 



Q 



Confined to the Ozark Ridge region, 



and there abundant only on dry rocky hillsides and in sandstone barrens. 

 Quercus Phellos L. The Willow Oak is rare in Illinois, and is found 

 sparingly in low woods in the vicinity of Cairo, and more abundantly, though 

 very local, in Massac County. No large trees were seen about Cairo, 

 but just north of the town of Brookficld some fair-sized specimens occur 

 in the low woods, and near Wickliffe, Kentucky, it is a common tree, 

 growing to a large size. 



Quercus imbricaria Michx. Occasional in upland woods througliout 

 Rare in the dryer situations of tlie Cairo Formation; infrequent in the 

 Mounds Formation, and somewhat more abundant in the Ozark region 

 and northward. 



Quercus hicolor X lyrata. 



Mound Cilv. Fnlaski Conn 



This hybrid was found in low woods near 



cies. 



Q, hicolor and Q 



Quercus alba X bicolor = Q. Jackiana Schneid. A tree supposed to be 

 this hybrid was found growing along a creek near Pinkneyville, Perry 

 County. It was growing with the supposed parent species and also with 

 Q, stellata, Tliere was no fruit on this tree. 



A tree supposed to be a hybrid between 



Q 



the Shingle Oak and Spanish Oak was found along the road side near 

 Rosidair, Hardin County. The adjoining field was a cleared upland, 

 and both supposed parent species, as well as Q. velutina and Q. palusfris, 

 were found in the fence-row growth. There was no fruit on \\\\s small 

 tree. A larger tree, growing in the edge of a cleared field near the little 

 town of Simpson, Johnson County, appears to be the same hybrid. This 

 latter specimen bore an abundance of fruit. The forest had been cleared 

 from the adjacent fields; but besides the supposed parent species both 

 Quercus velutina and Q. Shumardii var. Schnechi were growing near. 



Quercus imbricaria x velutina = Q. Leana Nutt. A medium-sized tree, 

 supposed to be a hybrid between these two species, was found along the 

 roadside in cleared uplands near the Post Office of Peters' Creek, Hardin 

 County. Trees of Q. imbricaria, Q. velutina and Q. Shumardii var. Schncckii 



Q 



From the form 



and color of the leaves this was at first taken to be a cross between the 

 Shingle Oak and Schneck's Oak, but from the character of the acorns 



