106 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv 



Shensi: Pai shi pu, F. N. Meyer, no. 1636, September 18, 1914 (Herb. 



U. b. Dept. Agnc.); Lung chow, Li kia po, alt. 1800 m., J. Hers, no. 2368, 

 July 4, 1022. 



Kansu: near Ping lo, F. N. Meyer, no. 1644, October 7, 1914 (Herb. U. S. 

 Dept. Agric). 



Distribution: also Manchuria, Korea, Japan. 



The specimens enumerated above are unfortunately all sterile, but agree 

 with typical U. japonica from Japan, except Hers' nos. 1455 and 1682 

 which have nearly glabrous branchlets and leaves and look more like 

 U. foliacea Gilib. 



Komarov in his Annotations to the flora of southern Ussuri (in Bull. 

 Jard. Bot. Pierre le Grand, xvi. 164 [1916]) distinguishes the following 

 varieties of U. japonica: a. laevis, 0. scabra, y. puberula and 8. saxatilis. 

 These probably occur, at least partly, also in northern China, but with 

 the incomplete material at hand and without having seen any of Komarov's 

 material it does not seem advisable to try to identify the Chinese material 

 with Komarov's varieties. 



Ulmus Davidiana Planchon in Compt. Rend. Acad. Sci. Paris, lxxiv 

 pt. 1, 1498 (1872), nomen; in De Candolle, Prodr. xvn. 158 (1873).— 

 Schneider in Sargent, PI. Wilson, in. 261 (1916), in part.— Hers in Jour. 

 N. China Branch R. As. Soc. liii. 116 (1922); Liste Ess. Lign. Honan, 32 

 (1922). 



Chili: Jehol, A. David, no. 1716 (ex Planchon, 1. c). 



Distribution: also Kiangsu (J. Hers, no. 664). 



Of this species I have seen a young leaf and a fruit of the type kindly 

 sent to the Arboretum by Professor H. Lecomte of the Natural History 

 Museum in Paris. The other specimens referred by Schneider (1. c.) to 

 this species I am unable to separate from U. macrocarpa Hance, from 

 which sterile specimens of U. Davidiana may be distinguished by the 

 absence of the corky wings, by the smaller and narrower leaves slightly 

 pubescent above when young and soon glabrous, pubescent beneath, by 

 the densely pubescent petioles and by the winter-buds covered with grayish 

 silky pubescence; in U. macrocarpa the branches usually develop two broad 

 corky wings, the leaves are much broader and larger, usually rhombic- 

 obovate, very scabrid above, and glabrescent beneath, the petioles are 

 only slightly pubescent and the winter-buds are dark chestnut-brown or 

 nearly black and only slightly villose. 



A specimen with young fruit collected in northern Kiangsu, on the Liu 

 lin shan, near Haichow (/. Hers, no. 664) apparently belongs here; in the 

 pubescence of the samara and the leaves it agrees with the type but the 

 leaves are more cuneate at base and the samara is nearly rounded and 

 abruptly contracted at the base; the hirsute pubescence of the branchlets 

 persists until the second year. 



The inclusion of U. Davidiana by Hers in his list of Honan plants is 

 probably an error and based on his no. 664 from Kiangsu. 



