ACERACEAE. ACER 93 



Kiangsi: Killing, thickets, alt. 1200 m., July 29, 1907 (No. 1501). 

 Western Hupeh: Hsing-shan Hsien, woods, alt. 1500-1800 m., May 

 and October 1907 (Nos. 341, 436, 225, in part); Fang Hsien, woods, 

 alt. 1700 m., October 1907 (No. 649); north and south of Ichang, 

 woods, abundant, alt. 1200-2300 m., September and October 1907 

 (No. 225 in part); Patung Hsien, side of streams, alt. 1200-1800 m., 

 May 1907 (No. 225, in part) ; Fang Hsien, woods, common, alt. 1500- 

 2300 m., May 28, 29 and June 1907 (No. 225, in part); South Wushan, 

 woods, alt. 1200-2100 m., June 1907 (No. 225, in part); Chang-yang 

 Hsien, alt. 1800 m., May 1907 (No. 225, in part) ; Chang-lo Hsien, woods, 

 alt. 1200-1500 m., May 1907 (No. 225, in part). WesternSzech'uan: 

 foot of Pan-lan-shan, west of Kuan Hsien, woods, alt. 2100 m., October 

 1908 (No. 1005); Mupin, woods, alt. 1200-1800 m., July and October 

 1908 (No. ioos a ); Wa-ssu country, Wen-chuan Hsien, side of streams, 

 alt. 2100 m., July and October 1908 (Nos. 1008, ioo8 a , 1918, in part); 

 southeast of Tachien-lu, woods, alt. 2100-2400 m., June, 1908 (No. 

 1917, in part); Hung-ya Hsien, alt. 900 m., September 12, 1908 (No. 

 1917, in part); Chin-ting-shan, northeast of Tachien-lu, woods, com- 

 mon, alt. 2100-2700 m., May 1908 (No. 1918, in part). 



Acer laxiflorum Pax in Engler, Pflanzenreich, Heft 8 (IV. 163), 36 

 (1905). 



? Acer Pavolinii Pampanini in Nuov. Gwrn. Bot. Ital n. ser. XVII. 422 (1910). 



Western Szech'uan: Wa-ssu country, Wen-chuan Hsien, woods, 

 alt. 1800-2300 m., July 1908 (Nos. 1007, 1309, in part); alt. 2100- 

 2700 m., October 1910 (No. 4099); Mupin, woods, alt. 1500-2300 m., 

 June, October and November 1908 (Nos. 1007% 1069, 1234); Wa- 

 shan, thickets, alt. 1800-2100 m., June and October 1908 (No. 1154); 

 southeast of Tachien-lu, woods, alt. 2400-2700 m., June 1908 (No. 

 1309, in part); Pan-lan-shan, west of Kuan Hsien, woods, alt. 2100- 

 2400 m., June 1908 (No. 1309 in part); Pan-lan-shan, west of Kuan 



the section Integrifolia, and A. carpinifolium Siebold & Zuccarini which remains 

 as the only species in the section Indivisa. This section is clearly distinguished from 

 the Macrantha by the character of the bark and particularly by the winter-buds 

 which have several pairs of outer imbricate scales, while the Macrantha have only 

 two valvate outer scales; the foliage and the inflorescence of A. carpinifolium are also 

 quite different from that of any species of the Macrantha. From the section 

 Macrantha as understood by Pax in his monograph two species, A. parviflorum 

 Franchet and A. erosum Pax, must be removed and transferred to the Spicata, the 

 last named as a synonym to A. caudatum, var. muUiserratum Render. In the con- 

 ception as now here proposed the section Macrantha will form a group of closely 

 related species very uniform in the characters of inflorescence, flower and fruit. 



