176 WILSON EXPEDITION TO CHINA 



July 16, 1897, G. Giraldi. Chekiang: vicinity of Ningpo, 1908, D. 

 Macgregor. 



Our specimens exhibit considerable variation in degree of pubescence; some 

 are very slightly hairy; others as No. 87 are densely so and approach the variety 

 veluiina Engler. A colloquial name at Ichang for this shrub is " Lu-mu." 



Here may be added a note on another Chinese variety not collected during the 

 Arnold Arboretum Expeditions. 



Cotinus coggygria, var. cmerea Engler in Bot. Jahrb. I. 403 (1881) ; in De Can- 

 doUe, Monog. Pkaner. IV. 351 (1883). 



Shantung: Tsingtau, September 1907, F. N. Meyer (No. 255). Chili: near 

 Peking, August 1865, S. W, Williams (Herb. Hance, No. 12008). 



/' 



RETOS L. 



Sect. I. SUMAC DC. 



Rhus punjabensis Stewart in Brandis, For. Fl, BriL Ind. 120 

 (1874). — Hooker f., Fl. Brit. Ind. IL 10 (1876). — Engler in De 

 Candolle, Monog. Phaner. IV. 378 (1883). — Brandis, Ind. Trees, 197 

 (1907). 



The typical form has not yet been found in China. 



Rhus punjabensis, var. sinica Rehder & Wilson, n. var. 



Rhus sinica Diels in BoL Jahrh. XXIX. 432 (1900). 



Rhus punjabensis Dunn in Jour. Linn. Soc. XXXIX. 485 (non Stewart) 

 (1911). 



Western Hupeh: north and south of Ichang, woodlands, alt. 

 1000-1600 m., July and September 1907 (No. 275; small tree 5-8 m. 

 tall, flowers whitish, fruit crimson) ; Changlo Hsien, woods, alt. 1300- 

 2000 m., June and July 1907 (Nos. 275^ 3320; tree 6-10 m. tall, 

 flowers whitish); Hsing-shan Hsien, woodlands, alt. 1300-2000 m., 

 July and December 1907 (No. 275*); tree 6-12 m. tall, girth 0.6-1 m., 

 fruit crimson); without locality, June 1900 (Veitch Exped. No. 1177, 

 flowers only); without locahty, A. Henry (Nos. 3157, 5529^). 

 Western Szech'uan: Washan, woods, alt. 1000-1600 m., July 

 1908 (No. 3317; tree 10 m. tall, girth 0.75 m., flowers white); south- 

 east of Tachien-lu, thickets, alt. 1300-1600 m., June 1908 (No. 3318; 

 bush 2-4 m. tall); Mt. Omei, June 1904 (Veitch Exped. No. 4813); 

 without exact locality, alt. 600 m.. May 1904 (Veitch Exped. No. 

 3369) ; Nan-ch'uan, A. von Rosthorn (Nos. 1971, 1969). 



This variety differs from the type chiefly in the slightly winged upper part of 

 the rhachis of the leaf, and in the usually fewer and more sessile leaflets. The 



