ENUMERATION OF THE SPECIES 87 



Herb. Boiss. V. 918 (1897) . Hooker f . in Bot. Mag. CXXV. t. 7681 (1899) . 

 J. H. Veitch, Hortus Veitchii, 373 (1906). Shirisawa, Icon. Ess. For. 

 Jap. II. t. 61, figs. 23-32 (1908). Schneider, III. Handb. Laubholzk. II. 

 497, figs. 327 h, 328 a-b (1911). Bean, Trees and Shrubs Brit. Isl. II. 

 353 (1914). Millais, Rhodod. 155 (1917). Komatsu in Tokyo Bot. 

 Mag. XXXII. [9] (1918). 

 Rhododendron dilatatum a. typicum Makino in Tokyo Bot. Mag. VII. 134 (1893). 



Japan: Hondo, prov. Shinano, 1864, Tschonoski (Herb. Gray); 

 prov. Suruga, Mt. Fuji, May 12, 1907, (flowers), August 15, 1905, 

 (leaves); prov. Sagami, Hakone Mts., alt. 600-1000 m. April 16, 1914, 

 E. H. Wilson (No. 6448); in a garden, Miyanoshita, April 17, 1914, 

 E. H. Wilson (No. 6429). 



Cultivated: Royal Gardens, Kew, May, 1880, G. Nicholson. 



Of the characters proposed by Maximowicz only that of the 5 stamens seems 

 to hold and, as I have already mentioned, I am not convinced that this is con- 

 stant. This form is believed to have been introduced to England by Messers 

 Veitch in 1883, but that it was in cultivation in Kew as early as 1880 is shown by 

 Nicholson's specimens preserved in this herbarium. I have no record of its being 

 cultivated in America though it will probably appear among the seedlings raised 

 from Japanese seeds collected by me in 1914 and distributed by the Arnold 

 Arboretum. 



Rhododendron quinquefolium Bisset & Moore in Jour. Bot. XV 

 292 (1877). Franchet & Savatier, Enum. PI. Jap. II. 653 (1879). 

 Matsumura, PI. Nikko, 71 (1894); in Tokyo Bot. Mag. XIV. 69 

 (1900); Ind. PL Jap. II. pt. 2, 463 (1912). Komatsu in Icon. PL 

 Koisikav. I. 59, t. 30 (1912); in Tokyo Bot. Mag. XXXII. [8] (1918). 

 Bean, Trees and Shrubs Brit. Isl. II. 374 (1914). Rehder in 

 Bailey, Stand. Cycl. Hort. V. 2947 (1916). Millais, Rhodod. 233 

 (1917). 



Japan : Hondo, prov. Shimotsuke, Nikko region, alt. 600-1600 m. 

 May 14, May 18, October 20, 1914, E. H. Wilson (No. 6683, type, 

 6683A, 7676); Lake Chuzenji, October 21, 1914, E. H. Wilson (No. 

 7676A); same locality, August 11, October 25, 1905, J. G. Jack. 



This very distinct species is well characterised by its corky, brown bark, its 

 broad-elliptic to obovate verticillate leaves and by its snow white, rotate-cam- 

 panulate corolla. In habit of growth, arrangement and shape of leaves and in 

 the shape of the flowers it superficially resembles R. pentaphyllum Maxim, but 

 the two belong to different sections. In Maximowicz's species the flowers and 

 leafy shoots originate from different buds, the flower-bud being terminal and the 

 leaf-buds lateral below it. In this new species both flowers and leafy shoots 

 issue from the same bud. This Azalea is abundant in shady, rocky ravines in the 

 Nikko region but is elsewhere unknown to me. It is a bush or small tree from 1.5 

 to 8 m. tall with gray-brown, corky bark, fissured into thick irregular plates; the 

 shoots are glabrous, terete, shining brown the first year and arranged partly in 

 verticils and partly alternate. The winter-buds are narrow-ovoid, acute, with 



