Ulmus r ^49 



(b) Leaves non-ciliate in margin. Branchlets developing corky ridges in 



the second or third year. 



3. Ulmus racemosa, Thomas. North America. See p. i860. 



Leaves oval or elliptic, about 3 in. long, usually sub-cordate at the base, 

 biserrate with incurved points, glabrous and smooth above, slightly pubescent 

 beneath without any trace of axil-tufts. 



T * Leaves, with lateral nerves often forked, and with conspicuous axil-tufts. 



(a) Young branchlets scabrous with numerous minute tubercles. Leaves 



ciliate in margin. 



4. Ulmus fulva, Michaux. North America. See p. 1862. 



Leaves oval or obovate, 5 to 7 in. long, scabrous above with minute tubercles 

 and short bristles, densely pubescent beneath, coarsely biserrate. 



(b) Young branchlets smooth. Leaves non-ciliate. 



5. Ulmus montana, Stokes. Europe, Asia Minor, Caucasus, Amurland, Manchuria, 



Japan. See p. 1864. 

 Branchlets stout, pubescent with stiff hairs. Leaves obovate or oval, 3 to 

 5 in. long, with short stout petioles, not exceeding in. in length ; scabrous 

 above, densely pubescent beneath. 



6. Ulmus vegeta, Lindley. A hybrid. 1 See p. 1879. 



Branches long, straight, and ascending. Branchlets slender, glabrous or 

 with a few scattered hairs. Leaves oval, 3^ to 5 in. long ; smooth or nearly so 

 and glabrous above ; glabrous beneath except for axil-tufts ; petiole \ to f in. 

 long. 



II. Leaves, with eight to fourteen pairs of lateral nerves ; very unequal at the base ; 

 plainly biserrate ; and with conspicuous axil-tufts beneath. 



* Young branchlets glabrous, or with only a few scattered hairs. 



7. Ulmus major, Smith. Europe. See p. 1883. 



Leaves broadly oval, 3 to 5 in. long, nearly smooth above, with a scattered 

 minute pubescence on both surfaces, and dense axil-tufts beneath ; petiole \ to 

 f in. long, pubescent. Epicormic branches with large corky ridges are usually 

 present on the stem. 



8. Ulmus nitens, 2 Moench. Europe, Algeria, Asia Minor, Caucasus, Persia, 



Turkestan. See p. 1887. 

 Leaves oval or obovate, 2 to 3^ in. long, shining and smooth above ; with 

 scattered minute pubescence on both surfaces in spring, disappearing in 

 summer ; glandular beneath ; petiole \ to \ in. long, pubescent. 



9. Ulmus minor, Miller. Europe. See p. 1901. 



Leaves elliptic, 1^ to 2 \ in. long, acute or acuminate at the apex ; dull and 



1 The other less common hybrids, having U. montana as one of the parents, are described, pp. 1868-1874. Most of 

 these hybrids have leaves with numerous lateral nerves ; but differ in habit and other characters from U. montana and 

 U. vegeta. 2 This species is very variable, and only the typical form is here indicated. 



