40 JOURNAL OF THE ARNOLD ARBORETUM [vol. iv. 



The form with nearly white flowers has been distinguished as 



Rhododendron brachycarpum var. leucanthum Koidzumi in Tokyo 



Bot. Mag. xxviii. (59) (1914), name only. 



On Dagelet Island in the Japan Sea and on the Diamond Mountains in 

 Korea I gathered this albino form which seems to be dominant there. 



A form with petaloid stamens has been named 



Mag 



brachycarpum var. Nemotoanum Mak 



Rhododendron brachycarpum var. Nemotoi Miyoshi in Jour. Coll. Sci. Tokyo, 

 xxvn. art. 11, 8, tt. 1, 2 and 3, figs. 1-4 (1910). 



This monstrosity was found growing wild on Adzuma-yama in Iwashiro 

 province, northern Hondo. 



Rhododendron brachycarpum var. lutescens Koidzumi in Tokyo Bot 



Mag. xxx. 77 (1916). 



Rhododendron Fauriei Franchet in Bull. Soc. Phil. 3 (1886).— Matsumura 



Ind. PI. Jap. ii. pt. 2, 459 (1912). 

 hododendron chrysanthum var. niko-mvin, 

 Icon. PI. Koisikav. in. 99, t. 195 (1917). 



Matsumura 



Rhododendron niko-montanum Nakai in Tokyo Bot. Mag. xxxi. 242 (1917). 



This variety is distinguished chiefly by the absence of indumentum on 

 the underside of the leaves; the flowers are white to yellowish white with 

 few or no green spots; occasionally the flowers are suffused with pink. It 

 occurs on many of the higher mountains of northern Hondo. Professor 

 Sargent in 1892 and myself in 1914 collected it on Hakkoda-yama in Mutsu 

 province at 5000 ft. altitude where it is abundant. I also gathered it on 

 Adzuma-yama between 4000 and 6000 ft. altitude. I have a specimen 

 collected by Pere Faurie (No. 5828) in woods "Ubaya" wherever that is. 

 Komatsu records it from the Nikko mountains and Koidzumi from Mt.On- 

 take in Shinano province. 



This form is in cultivation in the Edinburgh Botanic Garden where I 

 saw it in flower in the summer of 1922. It is an interesting plant but hardly 

 worthy of a distinctive name, anymore than are the color forms whose 

 names are collated above. 



Rhododendron chrysanthum Pallas, Reise, in. 729, t. N. fig. 1, 2 (1776); 

 Fl. Ross. i. 44, t. 30 (1784); Voyages, iv. 531, t. 31, fig. 1-2 (1793).— Lin- 

 naeus, Pflanzensyst. in. 559, t. 24-b (1778); Suppl. 237 (1781).— Zahn, 

 Diss. Inaug. (1784).— Wood ville, Med. Bot. in. 403, t. 149 (1793). 

 Chaumeton, Chamberet & Poiret, Fl. MeU vi. 47, t. 301 (1818).— Roques, 

 Phytogr. Med. i. 291. t. 84 (1821).— G. Don, Gen. Syst. in. 843, fig. 141 

 (1834).— Loudon, Arb. Brit. n. 1135 (1838).— DeCandolle, Prodr. vn. 

 723 (1839).— Ledebour, Fl. Ross. n. 920 (1846).— Trautvetter & Meyer 



M 



Burnett, PI. 



Utilior. in. no. 65, t. (1847).— Maximowicz in Mem. Acad. Sci. Sav. Etr. 



