136 Journal of the Mitchell Society [September 



pressed, not angled, thick walled. A tree 10-20 m. tall, growing 

 along the margins of pine barren swamps from Lumber Citv, Ga. 

 (type locality) to Georgetown, S. C. The absence of resinous glob- 

 ules and the oblong-ovate buds ally this form to porcina rather than 

 megacarpa. 



Variety of Hicoria cordiformis (Wang.) Brit. There is in 

 addition to the typical form with the large obeordate nut, a form, 

 II. c. elongata n. c. (Carya var. Ashe 1. c. ), with oblong acute fruit 

 and an oblong pointed nut. It has been found only in the mountains 

 of North Carolina. 



QuERCUs pagoda Raf. The swamp red oak is considered in the 

 Trees of !N^orth Carolina as a species under the name Q. pagodaefolia. 

 The form of the southern red oak wdth large thinly pubescent lower 

 leaves, quite like those of the black oak and upper leaves in shape like 

 those of the Spanish oak (Q. coccinea), but closely white pubescent 

 beneath and fruit much like that of the swamp red oak, has been de- 

 scribed as variety leucophyUa of the southern red oak (Bui. Ch. 

 Mus. Apl. 1917). Its affinities seem to be more with the swamp red 

 oak than with the southern red oak, and if regarded as a variety of 

 the former becomes Q. pagoda leucophyUa n. c. This tree, which 

 has very tough and valuable wood, is among the largest of American 

 oaks, 



QuERCus OBTusA (Willd.) Ashe. This is the common semi- 

 evergreen water oak of the coastal plain and for industrial uses is the 

 most valuable member of the water-oak group. The leaves are nar- 

 row, usually broadest near the middle, and longer than in Quercus 

 nigi'a, and seldom noticeably 3-lobed. Those on vigorous shoots are 

 not toothed and are usually unsymmetrical. The cup encloses about 

 one-third of the nut. 



Quercus ambigua Mx. This is a form of the northern red oak 

 which occurs on exposed sites in the higher mountains. It is not so 



