ENUMERATION OF THE SPECIES 103 



can discover it was first introduced to America in the spring of 1917 among plants of 

 the type imported from the Yokohama Nursery Company by Mr. J. S. Ames, North 

 Easton, Mass. In 1919 I brought back plants from Japan to the Arnold Arbore- 

 tum. Whether this plant has reached Europe I do not know, but there is no men- 

 tion of it in Millais's recent work on Rhododendrons. In this connection it should 

 be mentioned that Maximowicz (in Mem. Acad. Sri. St. Petersbourg, s6r. 7, XVI. 

 No. 9, 29 (Rhodod. As. Or.) [1870]) speaks of the form with yellow flowers as rare, 

 but it must be remembered that he confuses the Japanese and Chinese species and 

 calls both R. sinense. Maximowicz identifies this plant with the " Rjuku Tsutsusi, 

 lillifera Insulae Luconiae, flore languide luteo, petalis, surrectis, punctis satura- 

 tioribus variegatis " and with " Rjuku Tsutsusi flore igneo, punctis petalorum 

 croceis, apicibus rufis " (Kaempfer, Amoen. Exot. 848 [1712]). What the first 

 named of Kaempfer' s plant is I do not know, neither can I find out the " Insulae 

 Luconiae;" the description, however, would fit our new form (aureum) or the 

 Chinese species. The " Rjuku Tsutsusi fl. igneo " is R. scabrum G. Don (R. sub- 

 lanceolatum Miquel). Personally I doubt if Kaempfer saw or heard of R. japoni- 

 cum or its form aureum, since they are not favorite garden plants in Japan, neither 

 do they grow wild by the road he traversed from Nagasaki to Tokyo. 



A recently raised hybrid between R. japonicum Suring. and R. 

 canadense Zabel is : 



X Rhododendron Fraseri W. Watson in Gard. Chron. ser. 3, LXVII. 

 225 (1920). l 



Rhododendron luteum Sweet, Hort. Brit. ed. 2, 343 (1830), not 

 Azalea lutea L. Schneider, III Handb. Laubholzk. II. 1046 (1912), not 

 II. 500 (1911). Render in Bailey, Stand. Cycl Hort. V. 2942 (1916). 



Azalea pontica Linnaeus, Spec. 150 (1753), not R. ponticum Linnaeus, 



Pallas, Fl. Ross. II. 51, 1. 19 (1788). Andrews, Bot. Rep. 1. 1. 16 (1797). 



Schmidt, Qster. Baumz. III. 44, t. 169 (1800). Marschall a Bieberstein, 



Fl. Taur.-Caucas. I. 144 (1808); 111. 136 (1819). -Hovey, Mag. Hort. IV. 



276, 367 (1838). De Candolle, Prodr. VII. pt. 2, 718 (1839). 

 t Azalea flava Hoffmannsegg, Verz. Pflanzenkult. 61 (1826). 

 Anthodendron ponticum Reichenbach in Mosseler, Handb. Gewachsk. II. aufl. 



1. 309 (1827); Fl. Germ. Excur. I. 416 (1830). 

 Rhododendron flavum G. Don, Gen. Syst. III. 847 (1834), not Pallas. Nyman, 



Consp. Fl. Europ. 491 (1878-82). Schneider, III Handb. Laubholzk. II. 



499, figs. 328 n-q, 329 e-h (1911). Bean, Trees and Shrubs Brit. Isl II. 



356 (1914). Millais, Rhodod. 165 t. (1917). Boissier, Fl. Or. III. 972 



(1875). Kuzentzof, Fl. Caucas. Crit. IV. pt. 1, 31, 488 (1901, 1906). 

 Rhododendron flavum var. coronarium Sweet, Brit. Flow. Gard. ser. 2, IV. t. 



331 (1836). 

 Azalea arborea Linnaeus apud De Candolle, Prodr. VII. pt. 2, 718 (1839), as a 



synonym. 

 Rhododendron ponticum Schreber apud De Candolle, Prodr. VII. pt. 2, 718 



(1839), not Linnaeus, as a synonym. 



Azalea Pontica a. flava De Candolle, Prodr. VII. pt. 2, 718 (1839). 

 Azalea pontica var. autumnalis K. Koch in Linnaea XVII. 281 (1843). 

 Anthodendron flavum Reichenbach apud K. Koch, Dendr. II. pt. 2, 184 (1872), 



as a synonym. Schneider, III. Handb. Laubholzk. II. 499 (1911). 

 Azalea pontica "Goldlack" Hesse in Gartenfl. LII. 48 (1903). 



1 See page 185. 



