1923 WILSON, THE HORTENSIAS 237 



A form much cultivated is: 



Hydrangea macrophylla f. otaksa Wilson, n. comb. 



Hydrangea Otaksa Siebold & Zuccarini, Fl. Jap. i. 105, t. 52 (1840). — Van 

 Houtte in Fl. des Serr. xvn. 35, tt. 1732-33 (1867-68).— Neumann in Rev. 

 Hort. 1868, 452, t. 



Hydrangea Hortensia var. Otaksa A. Gray in Mem. Am. Acad. n. ser. vi. 

 312 (Bot. Jap.) (1857). — Maximowicz in M6m. Acad. Sci. St. P6tersb., 

 s6r. 7, x. no. xvi. 14 (Rev. Hydrang. As. Or.) (1867). — Hemsley in Garden, 

 x. 266 (1876). 



Hydrangea japonica $. Otaksa Regel in Gartenfl. xv. 290 (1866). 



Hydrangea Hortensis 1. Otaksa Franchet & Savatier, Enum. PL Jap. I. 152 

 (1875).— Nicholson, Diet. Gard. n. 163 (1887). 



Hydrangea opuloides d. Otaksa Dippel, Handb. Laubholzk. in. 323 (1893). 

 Schneider, 111. Handb. Laubholzk. i. 392 (1905). — Matsumura, Ind. PL 

 Jap. ii. pt. 2, 180 (1912).— Rehder in Bailey, Stand. Cycl. Hort. III. 1621, 

 fig. 1933 (1915). 



This form, characterized by its globose heads of sterile pink or blue 

 flowers, is one of the most popular with florists in America and Europe. 

 Siebold's name "Otaksa" is not used in Japan today and Japanese 

 scholars fail to understand its derivation. A number of named forms are 

 in cultivation including one with pure white flowers and known as Hy- 

 drangea "Thomas Hogg." 



Very similar to the above is: — 



Hydrangea macrophylla f. Veitchii Wilson, n. name. 



Hydrangea Hortensia var. japonica rosea Bean in Garden, l. 122, t. 1079 



(1896); not H. japonica var. rosea S. & Z. 

 Hydrangea hortensis var. rosea M. H. in Gartenwelt, vn. 582, t. (1903). 



Grignan in Rev. Hort. 1904, 544, t. 

 Hydrangea Hortensia var. rosea J. H. Veitch, Hortus Veitchii, 368 (1906). 



A garden form with deep rose-pink sterile flowers introduced from Japan 

 into England by Charles Maries in 1880. 



A form with black-purple shoots is: — 



Hydrangea macrophylla f. mandschurica Wilson, n. comb. 



Hortensia nigra Carriere in Rev. Hort. 1880, 180. 



Hydrangea nigra Carriere, 1. c, as a synonym. 



Hydrangea Mandschurica nova Baumann apud Carriere, 1. c, as a synonym. 



Hydrangea ramis pictis Haage & Schmidt apud Carriere, 1. c, as a synonym. 



Hydrangea opuloides mandschurica h. apud Dieck, Haupt-Cat. Zoeschen, 42 



(1885). 



Hydrangea ramulis nigris Hort. ex Dieck, 1. c. as a synonym. 



Hydrangea mandschurica Koehne, Deutsch. Dendr. 187 (1893). 



Hydrangea opuloides e. cyanoclada Dippel, Handb. Laubholzk. in. 323 (1893). — 



Rehder in Bailey, Stand. Cycl. Hort. ill. 1621 (1915). 

 Hydrangea hortensis var. nigra Rehder in Bailey, Cycl. Am. Hort. II. 785 



(1900).— Bean, Trees & Shrubs Brit. Isl. I. 625 (1914). 

 Hydrangea cyanoclada Hort. ex Bean, Trees & Shrubs Brit. Isl. i. 625 (1914), 



as a synonym. 



A curious form with the young shoots dark purple, almost black, and 

 rose-colored flowers most of which are sterile. The name "mandschurica" 

 is utterly misleading, the plant having nothing to do with Manchuria. 

 This form is cultivated (No. 5285) in the Arnold Arboretum and lives 



