ULMACEAE. — CELTIS 267 



This tree is not uncommon in the warm dry valleys of the Yachou prefecture 

 in western Szech'uan and here and there fine specimens are to be met with. A 

 picture of one of these will be found under No. 277 of the collection of my photo- 

 graphs and in my Vegetation of Western China, No. 156. 



Celtis Vandervoetiana Schneider, n. sp. 



Arbor ad 20 m. alta; ramuli etiam ut videtur novelli glaberrimi, 

 hornotiiii rubro-brunnei, angulati, lenticellis concoloribus sparsis 

 obtecti, annotini obscurius colorati; gemmae nondum satis evolutae 

 purpureae, ovatae, plus minusve fuseo-hirsutae. Folia magna, firma, 

 ovato-elliptica, basi plus minusve inaequali subrotunda v. acuta, apice 

 subsensim acuminata, supra intense v. dilute viridia, ut videtur levi- 

 ter nitentia, glabra, costa nervis nervillisque planis flavescentibus, 

 subtus plus minusve viridi-albescentia, costa nervisque elevatis, sed 

 vix distincte reticulata, nervis lateralibus a costa exeuntibus utrinsecus 

 basalibus 2 inclusis 3-5, in facie sub microscopio dense papillosa, tan- 

 tum in axillis paulo barbata, margine praecipue ultra medium utrinque 

 regulariter crenato-serrato-dentata, minimis exceptis 8-13 cm. longa, 

 4.5-7 cm. lata; petioli 1.4-1.9 cm. longi, superne anguste sulcati, 

 glabri, flavo-brunnei. Flores adhuc ignoti. Fructus axillares, singuli, 

 pedicellis 3-3.5 cm. longis glabris suffulti, aurantiaci, glabri, ovato- 

 elliptici, apiculati (in sicco), circiter 1.5 cm. longi et 1.1 cm. crassi; 

 putamina ovato-oblonga v. ovata, hilo dentato et excavate excepto 

 plus minusve leviter foveolata et costata. 



Western Szech'uan: Yungyang Hsien, roadsides, rare, alt. 1200 

 m., August 8, 1908 (No. 2320, type; tree 20 m. tall, girth 2.4 m.; with 

 ripe fruits); without exact locality, ravine, alt. 600 m., May 1904 

 (Veitch Exped. No. 4467; tree 10 m. tall; with unripe fruits). 



This is a well-marked species, apparently most closely related to the preceding, 

 but easily distinguished by its glabrousness and by its smooth leaves. 



The name is given in compliment to Mr. Christian van der Voet, Superintendent 

 of the Arnold Arboretum. 



A picture of this tree will be found under No. 282 of the collection of Wilson's 

 Chinese photographs and also in his Vegetation of Western China, No. 157. 



Celtis labilis Schneider, n. sp. 



Celtis sinensis Hemsley in Jour. Linn. Soc. XXVI. 450 (non Persoon) (1894), 

 quoad Henry's Nos. 3404 et 7866. 



Arbor ad 17 m. alta; ramuli hornotini paullo angulati, flavo-tomen- 

 tosi, breves fructiferi autumno v. hieme decidui, annotini glabrescentes 

 vetustioresque cinereo-rubiginosi, teretes, lenticellis paullo discoloribus 

 parvis obtecti; folia adulta satis crassa, pleraque ovato- v. elliptico- 

 oblonga, basi inaequali semirotunda v. obtusa, apice satis sensim 



