73 



Q. aquatica y elongata Ait. Hort. Kew. Ed. 2, 5, 290 (1H13), 

 not Q. elongata Willd. Nov. Act. Soc. Scrut. Borol. 3: 400. 

 1 801. 

 Q. laiirina Raf. Als. Am. (1838), not Q. laiirina Huml). tS: Ronp. 

 PI. Aeq. 2, 32 (1809). 

 It is doubtful whether Alton's Q. aquatica y elongata should be 

 included in this synonomy since the plate to which he refers 

 (Ab. Ins. Ga. tab. 59) clearly represents a not unusual form of 

 of Q. nigra individual trees of which occasionally bear, some- 

 times exclusively, such foliage in place of the usual spatulate 

 3-lobed form. Bartram's Q. hemispherica is undoubtedly this 

 tree (see Elliott, Sk. 2, 596), but he distinguishes it (Tr. pp. 318, 

 392, 472, Ed. 1792) from Q. nigra (aquatica) and from Q.phellos 

 as well as from Q. laurifolia (to which he refers as Q. dentata 

 " narrow leaved winter green oak")- He seems to have been 

 the first to separate these forms from Q. nigra. Michaux (Chencs 

 11) incorrectly refers Bartram's Q. dentata and. Q. hemispherica to 

 forms of Q. nigra, notwithstanding that he gives (t. 20, fig. 2) 

 a good figure of dentata even showing the clustered buds and 

 lanceolate leaves, broadest when entire (as they are on the slower 

 growing wood) at or near the middle. 



This tree is undoubtedly closely related to Q. laurifolia as 

 generally understood, but it can be readily separated from it by 

 the leaves of vigorous shoots, which in Q. laurifolia are irregularly 

 toothed, while in Q. obtusa the margins are entire. The cup also 

 has a very pointed base, while the base of the cup in Q. laurifolia 

 is flat. It occurs and is not uncommon along the edges of and 

 in the drier portions of hardwood swamps from southeastern 

 Virginia near McKenney, Dinwiddle Co., southward, being 

 found in the southern part of North Carolina 60 miles inland 

 along the Lumber River in Robeson County. Under the name 

 water oak it is generally planted in coastal towns, as in New 

 Berne and Wilmingon, N. C, as a shade tree. Q. laurifolia in 

 this section is restricted to the immediate vicinity of the coast 

 and is so strikingly different from Q. obtusa oak as to be separated 

 in places by local names. 



Quercus leucophylla n. comb., Q. rubra leucophylla Ashe (Bui. 



