Quercus I2 33 



This tree was discovered about 1830 by Mr. T. G. Lea near Cincinnati, Ohio, 

 and has since been found scattered as isolated specimens over a wide area, extending 

 from the district of Columbia and western North Carolina to southern Michigan, 

 central and northern Illinois, and south-eastern Missouri. (A. H.) 



The large tree near the Director's Office, Kew Gardens, which has long been 

 labelled Q. heterophylla, appears to belong to this hybrid. It was probably planted 

 by Sir W. J. Hooker, though its age and history are unknown. It measured in 1909 

 60 ft. high and 7^ ft. in girth. A smaller tree in the oak collection at Kew about 

 25 ft. higii, obtained from Smith of Worcester in 1877 under the name Q. villosa, is 

 very similar, and is certainly one of the hybrids of Q. imbricaria. 



A tree was growing in 1903 at Devonshurst, Chiswick, formerly part of the 

 Horticultural Society's garden, which Henry measured as 72 ft. by 6 ft. 8 in. It was 

 cut down shortly afterwards. 



At Ham Manor, Sussex, the seat of Sir H. Fletcher, there is a fine tree. 

 When I measured it in June 1907 it was 62 ft. by 7 ft. 2 in., forking at 7 ft., and 

 appeared to be grafted on a stock of the common oak, like the large one at Kew. 

 A smaller tree also exists at Orton Hall. (H. J. E.) 



QUERCUS HETEROPHYLLA, Bartram's Oak 



Quercus heterophylla, Michaux f., Hist. Arb. Am. ii. 87, t. 16 (18 12); Loudon, Arb. et Frut. Brit. 



iii. 1894 (1838); Engelmann, in Woods and Forests, 1884, pp. 735, 736; Sargent, Trees N. 



Amer. 248 (1905). 

 Quercus aquatica, var. heterophylla, Aiton, Hort. Kew. v. 290 (18 13). 

 Quercus nigra, var., Cooper, in Smithsonian Rep., 1858, p. 255 (1859). 

 Quercus Phellos x coccinea, Engelmann, in Trans. St. Louis Acad. iii. 541 (1877). 

 Quercus Phellos x velutina, Sargent, Silva N. Amer. viii. 180, adnot., t. 436 (1895). 

 Quercus Phellos x rubra; Quercus Hollickii, Schneider, Laubholzkunde, 165 (1904). 



A tree, occasionally attaining 80 ft. in height. Young branchlets glabrous. 

 Leaves (Plate 334, Fig. 16) deciduous, lanceolate or narrow-elliptic, acute at the apex, 

 cuneate at the base, 3 to 6 in. long, 1 to 2 in. wide ; with usually three to five pairs 

 of triangular bristle-pointed lobes, separated by wide sinuate sinuses ; glabrous on 

 both surfaces, except for axil-tufts beneath ; nerves pinnate, those ending in the 

 apices of the lobes more prominent than the intervening nerves, which divide and 

 loop before reaching the margin ; petiole \ to 1 \ in. long, slightly pubescent. 1 



The above description is drawn up from a tree in Kew Gardens, about 30 ft. 

 high, which was obtained from the Arnold Arboretum in 1877. Much variation, 

 however, occurs in the shape of the leaves on wild trees, which are often only slightly 

 lobed, and resemble those of Q. Phellos ; but in all cases, as Engelmann points out, 2 

 the elongated petiole will serve to distinguish Bartram's oak from Q. Phellos or 



1 The fruit, which I have not seen, is said to be sparingly produced on trees in America, and in some cases is like that 

 of Q. rubra, and in other cases similar to that of Q. velutina. 



2 In Woods and Forests, 1884, pp. 735, 736. 



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