234 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv 



Hydrangea macrophylla De Candolle, Prodr. iv. 15 (1830). 



Viburnum macrophyUum Thunberg, Fl. Jap. 125 (1784). 



Hortensia Commerson apud Jussieu, Gen. PI. 214 (1789). 



Hortensia opuloides Lamarck, Encycl. M6th. in. 136 (1789); Tab. Encycl. 

 Mah. ii. 501, t. 380 (1793).— Jacquin, Fragm. Bot. 7, t. 3, fig. 5 (1800).— 

 Jaume in Nouv. Duhamel, in. 98, t. 24 (1806). 



Primula mutabilis Loureiro, PI. Cochinch. 104 (1790). 



Hortensia japonica Gmelin in Linnaeus, Syst. Nat. ed. 13, n. pt. 1, 72 2 (1791).— 

 Buchoz, Monog. Ros. 267 (1804). 



Hydrangea hortensis Smith, Icon. Pict. PI., t. 12 (1792).— Sims in Bot. Mag. 

 xm. t. 438 (1799).— Willdenow, Sp. PI. n. pt. 1, 633 (1799).— Roth, Neue 

 Beytr. Bot. 202 (1802).— Martius, PI. Hort. Acad. Erlang.98 (1814).— Savi, 

 Fl. Ital. in. 65, t. 110 (1824).— Franchet & Savatier, Enum. PI. Jap. I. 150 

 (1875).— Nicholson, Diet. Gard. ii. 162, fig. 252 (1887).— Rehder in Bailey, 

 Cycl. Am. Hort. n. 784 (1900).— Bean, Trees & Shrubs Brit. Isl. i. 625 

 (1914).— Turner in Gard. Chron. ser. 3, lxxi. 87, fig. 42 (1922). 



Hortensia mutabilis Schneevoogt, Icon. PI. Rar. 36, t. (1793).— Zorn, Auswahl 

 Schon. Gew. m. t. 149 (1796). 



Hortensia japonica Zorn, Auswahl Schon. Gew. in. 58 (1796). 



Hortensia rosea Desfontaines, Tab. Ecol. Bot. 115 (1804). 



Hortensia speciosa Persoon, Syn. I. 505 (1805).— Targioni-Tozzetti in Ann. 

 Imp. Mus. Firenze, i. (Obs. Bot.) 36, t. 2, figs. 51-58, 61, 63, 65-69 (1808). 



Hydrangea Hortensia Siebold in Nov. Act. Acad. Leop.-Carol. xiv. pt. 2, 688 

 (Syn. Hydrang.) (1829).— De Candolle, Prodr. iv. 15 (1830).— Maximo- 

 wicz in Mem. Acad. Sci. St. Pelersb., ser. 7, x. no. xvi. 11 (Rev. Hydrang. 

 As. Or.) (1867).— Hemsley in Garden, vm. 145 (1875); x. 265 (1876). 



Hydrangea opuloides Hort. apud Savi, Fl. Ital. in. 65 (1824), as a synonym — 

 K. Koch, Dendr. i. 353 (1869).— Koehne, Dendrol. 187 (1893).— Dippel, 

 Handb. Laubholzk. in. 321 (1893).— Schneider, 111. Handb. Laubholzk. 

 I. 391, fig. 251 e -i (1905).— Rehder in Sargent, PI. Wilson, i. 37 (1911); in 

 Bailey, Stand. Cycl. Hort. in. 162 (1915).— Matsumura, Ind. PI. Jap. n. 

 pt. 2, 179 (1912). 



Hydrangea Hortensia y. flore plvno K. Koch, Hort. Dendr. 106 (1853). 

 Hydrangea japonica Y). plain Rogel in Gartenfl. xv. 290 (1866). 

 Hydrangea japonica r\. Hortensia Regcl in Gartenfl. xv. 290 (1866). 

 Hydrangea Hortensia e. Hortensia Maximowicz in Mem. Acad. Sci. St. Petersb., 



ser. 7, x. no. xvi. 14 (Hev. Hydrang. As. Or.) (1867). 

 Hydrangea Hortensis 2. hortensia Franchet & Savatier, Enum. PI. Jap. i. 152 



(1875).— Rehder in Bailey, Cycl. Am. Hort. n. 785 (1900). 

 Hydrangea Hortensia e. communis Hemsley in Garden, x. 260 (1876). 

 Hydrangea opuloides a. Hortensia Dippel, Handb. Laubholzk. in. 322 (1893). 



Rehder in Sargent, PI. Wilson, i. 37 (1911); in Bailey, Stand. Cycl. Hort. 



in. 1621 (1915).— Matsumura, Ind. PI. Jap. n. pt. 2, 180 (1912). 

 Hydrangea opuloides var. plena Rehder in Bailey, Stand. Cycl. Hort. hi. 



1621 (1915). J 



China; cultivated. Kwangtung, Honan Island, C. 0. Levine, No. 849, May 18, 

 1917; Hupeh, Ichang, A. Henry, No. 7385; Yunnan, Tali Valley, alt. 6 

 ft., G. Forrest, No. 5047, August, 1906. 



A shrub with many ascending-spreading stems forming a broad, rounded 

 bush from 1 to 4 m. tall, the shoots with abundant pith, clothed with 

 thin, purple-gray to pale gray scaling bark, terete, glabrous, except near 

 inflorescence, with prominent lenticels and leaf-scars. Leaves petiolate, 

 lustrous green, fleshy, subcoriaceous, obovate, rarely ovate or ovate- 

 elliptic, 8-20 cm. long, 4-10 cm. wide, cuspidate or short acuminate, at 

 base cuneate, often broadly so, dentate-serrate, except near base; teeth 

 inclined forward, triangular, terminating in a mucro-like gland, glabrous 

 or slightly puberulous, with occasional axillary tufts of short, curled hairs; 



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