TJLMACEAE. — ULMUS 239 



tains, May 1900 (Veitch Exped. No. 677 in part, type; tree 10 m. tall, 

 with ripe fruits and almost fully grown leaves [the sterile branchlets of 

 this No. belong to U. castaneifolia]) ; Fang Hsien, woods, 2000-2500 

 m., November 1910 (No. 4442; living material). 



This species seems to be closely related to U. japonica Sargent. As far as I can 

 judge from the material before me the color of the one-year-old branchlets and of 

 the well-developed buds (as indicated in the key) seem to afford good characters to 

 distinguish these two Elms. But there are glabrous forms of both which it is much 

 more difficult to separate and which need further observations in the field. 



To the typical form of U. Wilsoniana may belong Ulmus sp. nov.? Hemsley in 

 Jour. Linn. Soc. XXVI. 448 (1894); E. Pritzel in Bot. Jahrb. XXIX. 296 (1900), 

 the type of which is a sterile specimen collected by A. Henry in Wushan Hsien, 

 eastern Szech'uan (No. 5537; ex Hemsley), and to which E. Pritzel refers with some 

 doubt A. von Rosthorn's No. 678 from southeastern Szech'uan " Nanch'uan, Ch'ien 

 ts'un kou, an Flussufern," August 1891 (tree 12-15 m. tall; sterile). The leaves 

 are described as lanceolate and minutely serrulate, and without having seen a 

 specimen I cannot refer it to any of the Elms I have seen from central China. 



On the margins of moist woods and in thickets on the mountains of western 

 Hupeh this Elm occurs, but is nowhere common. It is a tree of moderate size, 

 growing from 15 to 25 m. tall, with a trunk from 1.5 to 3 cm. in girth and dark 

 gray shallowly fissured bark. Usually the branches are rather slender and ascend- 

 ing-spreading, forming a narrow crown, but on trees growing in more open country 

 the branches are fairly stout and spreading. Quite commonly the branchlets are 

 corky- winged. The species is in cultivation in this Arboretum from graftwood 

 sent from Fang Hsien in 1910. 



A picture of this tree will be found under No. 573 of the collection of my photo- 

 graphs and in my Vegetation of Western China, No. 493. E. H. W. 



Ulmus Wilsoniana, var. psilophylla Schneider, n. var. 



Arbor ad 23 m. alta, trunco cortice rugoso longitudinaHter fisso ob- 

 tecto; ramuli etiam novelli glabri, annotini olivaceo-brunnescentes, 

 vetustiores cinerascentes, rimosi, interdum suberosi (in No. 2802); 

 gemmae adhuc ignotae. Folia tantum juvenilia visa, obovata v. obo- 

 vato-oblonga, basi angustata, subrotunda, plus minusve v. vix asym- 

 metrica, apice subito in acumen distinctum contracta, supra glabra 

 V. costa parcissime pilosa, subscabriuscula, subtus pallidiora, tantum 

 axillis nervorum lateralium lateris longioris 17-20 distincte griseo-bar- 

 bata, laevia v. vix seabriuscula, margine argute dupliciter serrata serra- 

 turis primariis subincurvis, maxima ad 6.5 cm. longa et 3.2 cm. lata; 

 petioli satis graciles, ad 8 mm. longi, supra minute villosuli; stipulae 

 anguste lanceolatae, petiolis longiores, mox caducae. Inflorescentiae 

 fasciculato-cjTnosae; flores ignoti. Samarae (an satis maturae?) vix 

 a typo diversae. 



Western Hupeh : Fang Hsien, side of streams, alt. 1200-1600 m., 

 fairly common, May 21, 1907 (No. 2803, type; tree 13-23 m. tall, girth 



