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 Pavolinii 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, Wén-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 to A. Mazi- 
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 Maximowiez 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); Wén-tsao Mt., 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. 
s 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, 
