ACERACEAE. 
Determined by ALFRED REEDER. 
DIPTERONIA Oliver. 
Dipteronia sinensis Oliver in Hooker’s Icon. XXIX. t. 1898 (1889). 
Western Hupeh: north and south of Ichang, woodlands, alt. 
900-1800 m., June 1907 (No. 883, in part); Chang-lo Hsien, alt. 900- 
1800 m., September 1907 (No. 883, in part); Hsing-shan Hsien, alt. 
900-1600 m., July 1907 (No. 883, in part); Patung Hsien, alt. 1600 m., 
June 1907 (No. 883, in part). Western Szech’uan: Mupin, woods, 
alt. 1200-1800 m., September 1907 (No. 883, in part). 
The fruits of the specimens from Mupin are somewhat larger and sometimes 
3 em., long. 
ACER L. 
Sect. PLATANOIDEA Pax. 
Acer pictum Thunberg, Fl. Jap. 162 (1784). 
The typical form does not occur in China. 
Acer pictum, var. parviflorum C. K. Schneider, IU. Handb. Laub- 
holzk. YI. 225 (1907). 
Acer mono Maximowicz in Bull. Phys. Math. Acad. Sci. St. Pétersbourg, XV. 
126 (1857); in Mél. Biol. II. 416 (1857). 
Acer laetum, y parviflorum Regel in Bull. Phys. Math. Acad. Sci. St. Péters- 
bourg, XV. 219 (1857); in Mél. Biol. II. 486 (1857). 
Acer pictum, var. mono Pax in Bot. Jahrb. VII. 236 (1886); in Engler, Pflanzen- 
reich, Heft 8 (IV. 163), 47 (1903). — Rehder in Sargent, Trees and Shrubs, 
I. 177 (1905). 
Western Hupeh: Fang Hsien, woods, common, alt. 1200-2300 
m., May and September 1907 (Nos. 310, 1889?, 1905, 1915, 1919, 
1921); Hsing-shan Hsien, woods, alt. 1500-1800 m., May 31, 1907 
(No. 642); Wén-tsao-shan, Hsing-shan Hsien, alt. 1800-2400 m., 
May 1907 (Nos. 1897, 1922); Chang-yang Hsien, woodlands, May, 
July, and September 1907 (Nos. 1923, 1926, 2049). Western 
Szech’uan: Ta-p’ao-shan, northeast of Tachien-lu, forests, alt. 2300- 
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