1924] REHDER, LIGNEOUS PLANTS OF NORTHERN CHINA, II 157 



Deutzia corymbosa var. parviflora Schneider in Mitt. Deutsch. Dendr. Ges. 

 xin. 184 (1904). 



Chili: Weichang, W. Purdom, no. 40, 1910; Peking, western hills, «/. 

 Hers, no. 1618, September 5, 1921; Po hua shan, J. Hers, nos. 1442, 

 1474, July 1 and 14, 1921; Hsiao Wu tai shan, F. N. Meyer, no. 1230, 

 August 20, 1913; J. Hers, nos. 1496 and 1553, July 14, 1921; N. II. Cowdry, 

 no. 1662, July 13, 1921; Hsiao Wu tai shan, Tieh ling sze, alt. 1300 m„ J. 

 Hers, no. 2138, October 7, 1922; Hsiao Wu tai shan, Shui shih tao, alt. 

 1500 m., J. Hers, nos. 2161, 2163, October 8, 1922; Tung ling Mountains, 

 N. H. Cowdry, no. 1324, May, 1921, and no. 2150, May 18, 1921; without 

 precise locality, Plre Chanel, nos. 5, 1918, and 57, 1919. — See also Bunge, 

 1. c, Turczaninov, 1. c, Walpers, 1. c, Ma 



Franchet, 1. c, Hemsley, 1. c, Rehder, 1. c, and Limpricht, 1. c. 



Honan: Tsi yuan hsien, alt. 500 m., J. Hers, no. 2661, August 24, 1923; 

 Tsi yuan hsien, Tien tan shan, J. Hers, nos. 1743, 1744, 1898, September 

 21, 1921; Yung ning, Tsi li ping, J. Hers, no. 1377, September 30, 1919. 



Kansu: south of the Hoang ho, P. J. Piasezki (ex Hemsley, 1. c). 



Distribution: also Manchuria. 



For geographical reasons it is probable that the Kansu plant belongs 

 to the var. micrantha. 



Deutzia parviflora var. ovatifolia Rehder in Jour. Arnold Arb. i. 210 

 (1920). 



Chili: Weichang, W. Purdom, no. 40 (in part), 1910. 



This variety which is based on cultivated plants raised from seed sent 

 by W. Purdom under no. 40 differs chiefly in its distinctly ovate leaves, 

 rounded or truncate at the base and very sparingly stellate-pubescent 

 above and glabrous beneath; in the latter character it agrees with Fran- 

 chet's var. Bungei but that variety, as its name implies, is based on the 

 type of D. parviflora which has oblong-obovate leaves according to Bunge's 

 description. 



Deutzia parviflora var. micrantha, var. no v. 



Deutzia micrantha Engler in Bot. Jahrb. xxxvi. beibl. lxxxii. 51 (1905). — 

 Rehder in Sargent, PI. Wilson, i. 23 (1913). 



Shenki: Tsin ling shan, G. Giraldi, no. 7179 (photograph in herb. Arnold 

 Arb.); In-kia-po, G. Giraldi, June 4, 1897; Kin-san, G. Giraldi, 1897; 

 Tai pei shan, W. Purdom, no. 1040, 1910; "monte Lun-san-huo" G. 

 Giraldi, no. 783, May 23, 1892.— See also Engler, 1. c, and Rehder, 1. c. 



There are apparently no constant characters to separate D. micrantha 

 Engl, as a species from D. parviflora with which unfortunately Engler 

 did not compare it; according to the specimens cited above the variety 

 may be distinguished by its generally smaller flowers with petals 3.5-5 

 mm. long, and by the denser pubescence of the underside of the leaves 

 which are elliptic-ovate to ovate-lanceolate or oblong-lanceolate and 

 cuneate at base. The stellate hairs have 7-11 rays and are often so close 

 as to touch each other; particularly near the veins they often develop an 



