ACERACEAE. — ACER 93 
Kiangsi: Kuling, thickets, alt. 1200 m., July 29, 1907 (No. 1507). 
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. 1005"); Wa-ssu country, Wén-chuan Hsien, side of streams, 
alt. 2100 m., July and October 1908 (Nos. 1008, 10085, 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. 
I917, 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. Giorn. Bot. Ital. n. ser. XVII. 422 (1910). 
Western Szech'uan: Wa-ssu country, Wén-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. multiserratum Rehder. 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. 
