94 WILSON EXPEDITION TO CHINA 



Hsien, woods, alt. 2100-2400 m., June 1908 (No. 1904); alt. 2400- 

 2700 m., October 1910 (No. 4142); southeast of Sungpan, woods, alt. 

 2400-2700 m., August and October 1910 (Nos. 4100, 4513). 



I have seen no specimens of Acer PavoUnii Pampanini, but the description 

 agrees well with A. laxiflorum; it is based on specimens collected by C. Silvestri near 

 Siang-yang, which would extend the range of A. laxiflorum into northern Hupeh. 



Acer laxiflorum, var. longilobum Rehder, n. var. 



A typo differt foliis manifeste quinque-lobatis, lobis superioribus 

 caudato-acuminatis acumine argute serrato, interdum brevibus et 

 brevius acuminatis, basalibus parvis acutis, venis subtus et apice 

 petioli tomento floccoso flavido densiore obtectis, floribus purpureis. 



Western Szech'uan: Chiu-ting-shan, cliffs, alt. 2300 m., May 

 23, 1908 (No. 1927, type) ; Wa-ssu country, Wen-chuan Hsien, woods, 

 alt. 2400-2700 m., October 1910 (No. 4108); Tu-ti-liang Mts., Lungan 

 Fu, woods, alt. 2400-2700 m., August 1910 (No. 4509). 



This variety differs markedly from the type in its five-lobed leaves, but occa- 

 sionally, particularly near the ends of the shoots, leaves appear which are similar 

 to those of the typical form. The variety presents also some resemblance io A. Maxi- 

 mowiczii Pax, but that species has the middle lobe much more elongated and 

 narrower, the lateral lobes more spreading and also narrower, and the leaves are 

 quite glabrous when unfolding except tufts of hairs in the axils of the veins. 



Acer Maximowiczii Pax in Hooker's Icon. XIX, text to t. 1897 

 (1899). 



A. urophyllum Maximowicz in Act. Hort. Petrop. XI. 105 (1890). 



Western Hupeh: north and south of Ichang, woods, common, 

 alt. 1200-2300 m., May and September 1907 (Nos. 355, in part, 1914, 

 in part); Hsing-shan Hsien, woods, alt. 1800-2000 m.. May 1907 

 (Nos. 355, in part, 1914, in part); Wen-tsao INIt., Hsing-shan Hsien, 

 woods, alt. 1800-2000 m.. May 27 and June 5, 1907 (No. 355, in part); 

 Fang Hsien, woods, alt. 2000-2500 m.. May and July 19, 1907 (Nos. 

 355, in part, 1914, in part); alt. 1500-2400 m., October 1910 (No. 

 4427); South Wushan, woods, alt. 1200-1500 m., September 1907 (No. 

 229). 



Sect. ARGUTA Rehder 



Acer tetramerum Pax in Hooker's Icon. XIX. text to t. 1897 (1889). 



Western Hupeh: north and south of Ichang, woods, abundant, 

 alt. 1200-2100 m., May and September 1907 (No. 274, in part); Chang- 

 lo Hsien, alt. 1500-1800 m., May 1907 (No. 274, in part); Fang Hsien, 



