192.4 The Trees of Great Britain and Ireland 



Asahigawa, and noted that though the bark of the two was indistinguishable, the 

 leaves were very distinct. I did not, however, notice that it produced suckers. 



U. japonica was introduced into the Arnold Arboretum by seeds sent in 1895 

 from Sapporo by Professor Miyabe, and has grown there rapidly. Professor 

 Sargent informs us that in October 191 1, the trees which were raised vary from 

 17 to 30 ft. in height, and 1 ft. 2 in. to 2 ft. 4 in. in girth. Some of them produced 

 flowers in the spring of 1907. This elm is perfectly hardy in eastern Massachusetts, 

 where it promises to become an ornamental tree of great value. It was subsequently 

 introduced into Europe by Spath 1 in 1900. 



There are two trees at Kew, one obtained from the Arnold Arboretum in 

 1897, which is now about 12 feet high ; and another obtained from Spath in 1900. 

 There is also a good specimen in the Edinburgh Botanic Garden, about 15 feet 

 high. (H. J. E.) 



ULMUS ALATA, Wahoo, Winged Elm 



Ulmus a/a/a, Michaux, Fl. Bor. Am. i. 173 (1803); Loudon, Arb. et Frut. Brit. iii. 1408 (1838) ; 



Sargent, Silva N. Amer, vii. 51, t. 313 (1895), and Trees N. Atner. 291 (1905). 

 Ulmus pumila, Walter, Fl. Carol, m (1788) (not Linnaeus). 



A tree, attaining in America 50 ft. in height and 5 ft. in girth, with thin scaly 

 bark. Young branchlets minutely pubescent, furnished in the second or third season 

 with two peculiar thin and wide corky wings which persist for many years. Buds 

 ovoid, glabrous, sharp-pointed. Leaves (Plate 411, Fig. 12) deciduous in autumn, 

 thin in texture, \\ to 2\ in. long, averaging f in. broad, oblong-lanceolate or narrowly 

 elliptic, slightly unequal or subcordate at the base, acute or acuminate at the apex ; 

 smooth above ; lower surface without axil-tufts and glabrescent, except for hairs on 

 the midrib ; lateral nerves eight to ten pairs, rarely forking before reaching the 

 margin, which is biserrate and fringed with minute cilia, only visible with a good 

 lens. 



Flowers, appearing in spring before the leaves, few in a fascicle, on long 

 pedicels ; calyx five-lobed ; ovary tomentose, stalked. Samara narrowly elliptic, 

 \ in. long, contracted at the base into a long slender stalk, tipped at the apex with 

 long incurved stigmas, covered on the surface with long white hairs, which are most 

 numerous on the thickened margin. 



This species is readily distinguishable by the corky wings on the branchlets, 

 which differ from those on the other corky elms (except U. crassifolia) in being 

 regularly two in number, very thin, and of considerable width (Plate 411, Fig. 12). 



U. alata, which is sometimes known by the native Indian name wahoo, is 

 indigenous in the warmer parts of the eastern United States, occurring from southern 

 Virginia southward to Florida, and westward to southern Indiana, southern Illinois, 

 Missouri, Arkansas, Indian Territory, and the valley of the Trinity river, Texas. 

 It is usually too small in size to be of any value for timber. 



1 Spath, Cat. No. 106, p. 124 (1900-1901). 



