158 JOURNAL OF THE ARNOLD ARBORETUM [vol. v 



elongated central ray usually with a corresponding reduction of the lateral 

 rays, which gives a pilose appearance to the pubescence. The pubescence 

 is very dense in Giraldi's specimens from In-kia-po and from Kin-san 

 and rather scattered in Purdom's specimens from the Tai pei shan. In 

 typical D. parviflora the pubescence of the underside of the leaves is usually 

 very slight and sometimes nearly wanting. The size of the flowers affords 

 no clear distinction as e. g. Komarov's no. 836 from Manchuria and part 

 of Purdom's no. 40 from Chili have flowers with petals not exceeding 5 

 mm. in length. 



As stated under D. parviflora Piasezki's specimens from Kansu referred 

 by llemsley to D. parviflora probably belong here. 



Deutzia corymbosa R. Brown apud Roylc, 111. Bot. Ilimal. 216, t. 

 46, fig. 2 (1839).— Diels in Bot. Jahrb. xxix. 371 (1900).— Engler in Bot. 



Jahrb. xxxvi. beibl. lxxxii. 51 (1905). 



Shensi: Tui kio shan, G. Giraldi, no. 1120 (ex Diels, 1. c.) and Ki fon 

 shan, G. Giraldi, no. 4504 (ex Engler, 1. c). 



It is very doubtful if these specimens belong to D. corymbosa R. Br. 



ifl 



>-fl> 



Deutzia glabrata Komarov in Act. Hort. Petrop. xxn. 433 (1903). 

 Schneider in Mitt. Deutsch. Dendr. Ges. xin. 185 (1904). — Rehder in 

 Sargent, PI. Wilson, i. 24 (1913). — Loesener in Bot. Centralbl. Beih. 

 xxxvii. abt. n. 130 (1919). 



Deutzia glaberrima Koehne in Bot. Jahrb. xxxiv. beibl. lxxxii. 38 (1904). 



Shantung: Lau shan (ex Schneider, 1. c, Koehne, 1. c, Rehder, 1. c, 

 and Loesener, 1. c). 



Distribution: also Korea. 



Deutzia hypoglauca Rehder in Sargent, PL Wilson, i. 24 (1913). 



W 



no. 428, 1910. 



Distribution: also Hupeb, Yunnan (Delavay, no. 986). 



Hydrangea Bretschneideri Dippel, Handb.Laubholzk.in. 320 (1893). — 



Rehder in Sargent, PL Wilson, i. 38 (1913). 



Hydrangea pvbescens "Dne?" Maximowicz in M6m. Div. Sav. Acad. Sci. 

 St. P6t(>rsb. ix. 472 (Ind. Fl. Pekin.) (1859).— Non Decaisne. 



Hydrangea vestita var. pvbescens Maximowicz in M6m. Acad. Sci. St. Pdtersb. 

 x. no. xvi. 10 (1S()7), excl. svnon. Decaisne. — Franchet in Nouv. Arch. 

 Mus. Paris, s<h\ 2, vi. 5 (PL David. I. 124) (1883).— Sargent in Gard. & 

 Forest, m. 17, fig. 3 (1S<*0).— Palibin in Act. Hort. Petrop. xiv. 119 

 (1895).— Bretschneider, Hist. Eur. Bot. Discov. China, 348, 565, 1054 



(1898). 

 Hydrangea vestita Hemsley in Jour. Linn. Soc. xxm. 274 (1887). — Non 



Wallich. 

 Chili: Weichang, W. Purdom, no. 76 a , 1910; Po hua shan, J. Hers, 



nos. 1448 and 1672, July 1 and September 9, 1921; Hsiao Wu tai shan, 



