32 THE AZALEAS OF THE OLD WORLD 



more a condition of than a distinct form. In all the forms of R. obtusum, including 

 the large flowered var. Kaempferi, the stamens are variable in length, and are in- 

 constant in this from year to year. In the wild f . japonicum and the cultivated 

 " Kurume Azaleas " the stamens are conspicuously variable in length. The same is 

 true of the/, multicolor. Besides the co-type cited above there is another Japanese 

 specimen in the Kew Herbarium from Maximowicz, collected by Tschonoski in 

 Shinano province, central Hondo, in 1864, and labelled, apparently in Maximo- 

 wicz's handwriting, " Rhod. indicum a. Kaempferi forma subalpina." This differs 

 only in having larger flowers than those of his R. macrostemon. 



A well-known form with magenta-colored flowers is : 

 Rhododendron obtusum f. amoenum Wilson, n. comb. 



Azalea amoena Lindley in Paxton, Flow. Gard. III. 81, t. 89 (1852). Hooker 



in Bot. Mag. LXXIX. t. 4728 (1853). Rev. Hort. 1854, 241, t. Van 



Houtte in Fl. des Serr. IX. 75, t. 885 (1854). Hovey, Mag. Hort. XXII. 



9 (1856); XXIII. 70 (1857); XXIV. 141 (1858). 

 Rhododendron amoenum Planchon in Fl. des Serr. IX. 80 (1854); in Rev. Hort. 



1854, 64. Bean, Trees and Shrubs Brit. Isl. II. 341 (1914). 

 Rhododendron Buergeri Miquel in Ann. Mus. Lugd.-Bat. I. 34 (1863); in II. 



164 (1865-66); Prol. Fl Jap. 96 (1866-67). 

 Rhododendron indicum c. amoenum d. genuinum Maximowicz in Mem. Acad. 



Sd. St. Petersburg, s6r. 7, XVI. No. 9, 41 (Rhodod. As. Or.) (1870). 



Franchet and Savatier, Enum. PL Jap. I. 292 (1875). Matsumura, Ind. 



PI. Jap. II. pt. 2, 461 (1912). Millais, Rhodod. 193 (1917). 

 Rhododendron indicum e. amoenum b. normale Maximowicz in Mem. Acad. Sci. 



St. Petersburg, se'r. 7, XVI. No. 9, 41 (Rhodod. As. Or.) (1870). 

 Rhododendron indicum c. amoenum c. Buergeri Maximowicz in Mem. Acad. 



Sci. St. Petersburg, se>. 7, XVI. No. 9, 41 (Rhodod. As. Or.) (1870). 

 Azalea amoena Caldwelli Caldwell apud Van Geert, Icon. Azal. Ind. 45, 1. 17 



(1882). 



Azalea indica var. amoena Render in Bailey, Cycl. Am. Hort. I. 122 (1900). 

 Rhododendron Kaempferi var. amoenum Render in Sargent, Trees and Shrubs, 



II. 30 (1907). Schneider, III. Handb. Laubholzk. II. 505, fig. 332, f-g 



(1911). 

 Rhododendron obtusum var. amoenum Render in Bailey, Stand. Cycl. Hort. 



V. 2944 (1916). Komatsu in Tokyo Bot. Mag. XXXII. 41 (1918). 

 Azalea amoena Hatsu-giri Millais, Rhodod. 113 (1917). 



Japan: Kyushu, prov. Hizen, cultivated, Nagasaki, 1863, C. 

 Maximowicz (Herb. Kew, Herb. Gray). Hokkaido, prov. Oshima, 

 Hakodate, cultivated, 1861, C. Maximowicz (Herb. Kew as f. normale 

 Maxim.). Without locality, probably Nagasaki, ex Herb. Lugd.- 

 Bat. (Herb. Kew as R. Buergeri Miquel). 



Cultivated: Hort. Standish (Herb. Kew, type of Bot. Mag. t. 

 4728). Arnold Arboretum, May 29, 1884, May 24, 1902 (Nos. 862-1, 

 862-2). 



This Azalea, with its small, rich magenta-colored flowers, its small leaves and 

 dense, twiggy habit, is too well known to need further description. It was first 

 sent to England in 1850 or 1851 from Shanghai by Robert Fortune and was soon 

 recognized as the most hardy of its class. It is generally assumed to be of Chinese 



