122 WILSON EXPEDITION TO CHINA 



Giraldi. Chili: near Peking, in hedges, September 16, 1903, C. S. 

 Sargent; same locality, Skatchkov. 



This shrub, the " Hwa-chiao " (Chinese pepper or spice bush), is commonly 

 cultivated through central and western China, especially in the dry, hot river- 

 valleys. It also occurs on the cliffs and by the waj'sides and is probably indigenous. 

 In degree of armature, and size and shape of the leaves there is considerable varia- 

 tion. Commonly the plant is everywhere glabrous but the larger leaflets have 

 usually beneath a tuft of villose hairs on each side of the base of the midrib; occa- 

 sionally the pedicels and very rarely the young shoots are sparsely pubescent. Zan- 

 thoxylum fraxinoides Hemsley, is founded on a broad-leaved, sparsely spinose 

 form, but specimens before us show every gradation and we are quite unable to 

 separate them even as a variety. 



This species is the only one we have seen cultivated by the Chinese and its 

 fruits are their most prized condiment. A picture of this shrub will be found 

 under No. 0145 of the collection of Wilson photographs. 



Here may be added a new variety not collected during the Arnold Arboretum 

 Expeditions. 



Zanthoxylum Bungei, var. Zimmennannii Rehder & Wilson, n. var. 



A typo recedit foliis majoribus cum petiolo ad 28 cm. longis, foliolis oVato- 

 ellipticis v. ovato-oblongis acuminatis 4-9 cm. longis, inflorescentia laxiore et 

 longiorc 6-10 cm. longa et 9-13 cm. lata. 



Shantung: Tsingtau, Zimmermann, 1901 (No. 460, type). Korea: Quel- 

 paert, U. Faurie, October 1906 and July 1907 (Nos. 463, 1628); Taquet, May 20, 

 1908 and May 1909 (Nos. 621, 2709). 



This variety is chiefly distinguished by its much larger and looser inflorescence, 

 from the type, the inflorescence of which usually measures only 3-4 cm. in diam. 

 and is rather compact; the leaflets of the type are obtusish or acutish and very 

 rarely exceed 4 or 5 cm. in length. In the specimens from Shantung the leaflets 

 measure 5.5-9 cm., while in the specimens from Quelpaert they are smaller and 

 sometimes not more than 3 cm. long, but the inflorecsence is the same as that of 

 the Shantung specimen. 



Zanthoxylum Piasezkii Maximowicz in Act. Hort. Petrop. XI. 93 



(1889). 



Zanthoxylum piperitum Maximowicz apud Hemsley in Jour. Linn. Soc. XXIII. 

 107 (non De Candolle) (1886), quoad plantam Piasezkii. 



Western Szech'uan: Mao-chou, arid regions throughout Min 

 valley, alt. 1000-2000 m., May and August 1908 (No. 1174; bush 1- 

 2 m., fruit red); Wen-ch'uan Hsien, arid places, alt. 1300-2000 m., 

 October 1910 (No. 4390; bush 1.5-3 m.); same locahty, alt. 1600 m., 

 July 1903 (Veitch Exped. No. 3309); without locahty. May 1904 

 (Veitch Exped. No. 3310). 



This shrub is common in the dry hot river valleys of western Szech'uan and 

 has smaller leaves than any other Chinese species known to us. Our specimens 

 agree with Maximowicz's description except that the sepals are rather larger 

 and none of the leaflets are quite as small as the lowest measurements given by 

 Maximowicz. 



