174 JOURNAL OF THE ARNOLD ARBORETUM [vol. v 



Sorbaria arborea Schneid. var. glabra ta Rehder in Sargent, PI. Wilson, 

 i. 48 (1913). 



Sorbaria sorbifolia Pritzel in Bot. Jahrb. xxix. 384 (1900). — Non Linnaeus. 

 Sorbaria arborea Hers in Jour. N. China Branch R. As. Soc. liii. 116 (1922); 

 Liste Ess. Lign. Honan, 29 (1922).— Non forma typica Schneideri. 



Honan: Yung ning, Chuan pao shan, alt. 1500 m., J. Hers, no. 118, 

 October 17, 1919; Sung hsien, San kuan miao, alt. 1000 m., J. Hers, no. 

 1323, September 27, 1919.— See also Hers, 1. c. 



Shensi: Kan y san, June 11, 1897, Kan y quo (Huo kia zaez), July 8, 

 1897, Po uo li, July 29, 1897, Lao y san (Zu lu) September 6, 1897, Kin 

 san, 1897, G. Giraldi; Tai pei shan, W. Purdom, no. 1039, 1910 

 also Pritzel, 1. c. 



Kansu: Min chow, W. Purdom, no. 1018, 1910. 



Distribution (of the variety): Hupeh, Szechuan, Yunnan; the typical 

 form is common in Hupeh and Szechuan. 



Purdom *s no. 1018 from Kansu differs in its leaves which have only 

 4 to 5 pairs of smaller less long-acuminate leaflets with inconspicuously 

 serrulate teeth and with fewer more distant veins very slightly bearded 



in the axils. In Kansu apparently S. arborea as well as S. Kirilowii occur, 



See 



tbe former south of the Tsing ling shan range, the latter north of it, and I 

 assume that the specimen collected by the Szechenyi Expedition which 

 traversed northern Kansu belongs to S. Kirilowii as determined by Kanitz. 

 These two species are not always easily distinguished without fruit; the 

 inflorescence of S. Kirilowii though upright as in S. sorbifolia is broader 

 and looser and approaches in this respect that of S. arborea, and the length 

 of the stamens, about as long as the petals in S. Kirilowii and usually 

 much longer in S. arborea, seems variable in the latter species. Sorbaria 

 sorbifolia L. has not been found in northern China; it is a more northern 

 species ranging from western Siberia to Kamtschatka and Saghalin. 



Exochorda racemosa Rehder in Sargent, PL Wilson, i. 456 (1913) 

 Bailey, Gent. Herb. I. 28 (1920). 



Honan: Chi kung shan (ex Bailey, 1. c). 



Distribution: also Kiangsu, Chekiang. 



Exochorda Giraldii Hesse in Mitt. Deutsch. Dendr. Ges. xvn. 191, 219 

 (1908); xvm. 295, fig. (1909); in Fedde, Rep. Spec. Nov. vm. 347 

 (1910). 



lxxxii. 52 (1905). — Non Lindley. 



(1900); 

 Wilson 



? Exochorda racemosa var. Wilsonii Farrer in Jour. Roy. Hort. Soc. xlii. 74 

 (1916).— Vix Rehder. 



Shensi: Kin qua san, G. Giraldi, July 10, 1897; Lao y san, G. Giraldi, 

 1897; Tai pei shan, W. Purdom, no. 1, 1910; Moutan shan, northwest 

 of Han chang hsien, W. Purdom, no. 361, 1910; ?Hu kia scien, Hugh 

 Scallan, 1897. — See also Rehder, 1. c. 



? Kansu: near Siku (ex Farrer, 1. c). 



