ENUMERATION OP THE SPECIES 65 



Korea: prov. Keiki, cultivated, Forestry Experimental Garden, 

 Keijyo, May 21, 1917, E. H. Wilson (No. 8422). 



Cultivated : Arnold Arboretum (No. 7345); ex Hort. E. G. Loder, 

 May, 1898 (Herb. Kew). 



This double-flowered Azalea, in recent years exported from Japan in some quan- 

 tity to the gardens of Europe and America, is certainly nothing but a monstrous 

 form of R. yidoense var. poukhanense Nakai. My Korean specimens came from a 

 plant which had been found wild not far from Mt. Poukhan and transplanted to 

 the Government Forestry Experimental Garden, and are indistinguishable from 

 others taken from plants cultivated in the Arnold Arboretum. The habit is spread- 

 ing and more lax than in the type except when the latter grows among tall bushes. 

 The flowers are quite double, and the corolla is rose-purple and much less beautiful 

 than that of the type; the calyx is green, often larger than in the type, with oval 

 segments. The leaves are characteristic and have the impressed veins on the 

 upper surface. 



This form seems to have become known in our gardens comparatively recently 

 and to have been first introduced into Petrograd by Japanese and exhibited at the 

 International Exhibition there in 1884. It is perfectly hardy in the Arnold Arbor- 

 etum. Matsumura gives " Botan-tsutsuji " (Paeony Azalea) as the vernacular 

 name of this plant. 



The wild type of the species is: — 



Rhododendron yedoense var. poukhanense Nakai in Tokyo Bot. 

 Mag. XXXIV. (274) (1920). 



Rhododendron indicum var. Simsii Palibin in Act. Hort. Petrop. XVIII. 150 

 (Consp. Fl. Kor. 11, 4) (1900), not Maximowicz. — Nakai in Jour. Coll. 

 Sci. Tokyo, XXXI. 76 (Fl._ Kor. II) (1908). 



Rhododendron poukhanense Leveine 1 in Pedde, Rep. Nov. Sp. V. 100 (1908). — 

 Nakai in Journ. Coll. Sci. Tokyo, XXXI. 76 (Fl. Kor. II) (1908); in 

 Tokyo Bot. Mag. XXXI. 244 (1917); Fl. Syl. Kor. VIII. 47, t. 18 (1919). 

 — Komatsu in Icon. PI. Koisikav. II. 97, t. 133 (1915). — Rehder in 

 Mitt. Deutsch. Dendr. Ges. XXIV. 225 (1916) ; in Bailey, Stand. Cycl. Hort. 

 V. 2943 (1916). 



Rhododendron hallaisanense Leveilte in Fedde, Rep. Nov. Sp. XII. 101 (1913). 



Rhododendron coreanum Rehder in Mitt. Deutsch. Dendr. Ges. XXII. 259 

 (1913). — Millais, Rhodod. 148 (1917). 



Korea: Quelpaert Island, sea-level to 1600 m. abundant, October 

 29, November 6, 1917, E. H. Wilson (Nos. 9396, 9458); same locality 

 April 14, October 25, 1908, June 1909, E. Taquet (Nos. 1090, 1091, 

 4679, 4680, 2972) ; prov. South Keisho, Fusan, May 18, 1906, U. Faurie 

 (No. 670); prov. Keiki, Kazan, near Suigen in Pine-woods, May 24, 

 1917, E. H. Wilson (No. 8472); Seoul, April 29, 1894, Miss A. Sontag 

 (Herb. Kew); same place, Mt. Poukhan, September 25, 1905, J. G. 

 Jack; province unknown, " Mt. Pomasa," May 21, 1906, U. Faurie 

 (No. 664). 



Cultivated: Arnold Arboretum (No. 7254). 



