98 THE AZALEAS OF THE OLD WORLD 



Dendr. Ges. XI. 30 (1902). — Schneider, III. Handb. Laubholzk.il 

 499 (1911). 



Rhododendron occidentale X sinense Zabel in Beissner, Schelle & Zabel, Handb. 



Laubholzk-Ben. 380 (1903), as a synonym. 

 Rhododendron molle X occidentale Schneider, III. Handb. Lavbholzk. II. 499 



(1911), as a synonym. 

 Azalea occidenlalis "Hybrids" Hort. Wezelenburg, Cat. 9 (1915). 

 Rhododendron occidentale X R. molle x " Ghent Azaleas " Millais, Rhodod. 220, 

 fig. (1917). 

 Many varieties of this hybrid have been raised by Anthony Waterer and by 

 Koster & Sons, among the best being "Superba," "Graciosa," "Exquisite" and 

 "Magnifica." The parentage is, apparently, very mixed; a majority have large 

 white flowers with the usual yellow blotch characteristic of the flowers of the 

 American species, but some have cream and others yellow flowers with a darker 

 blotch. They flower between early June and mid-July and are very hardy. 



In quite recent years X R. Kosterianum has been hybridised with a 

 variety of forms of X R. gandavense and the result is a race with 

 double flowers, for which I propose the name of: — 



X Rhododendron mixtum Wilson, n. nom. 



Azalea rustica flore-pleno Hort. ex Vandervoorde in Rev. Hort. Belg. XIX. 

 232, t. (1893), not Van Houtte. — Cat. A. Waterer, 10 (1911-12.) — Cat. 

 Wezelenburg, 10 (1915). — Millais, Rhodod. 213 (1917). 



It appears to be safer to give a new name to this race than to risk confusing it 

 with the double-flowered " Gandavensis hybrids " (Azaleas rustique de Gand) 

 first raised by Louis van Houtte, who figures four varieties in Flore des Serres XIX, 

 tt. 2021-2024 (1873), and of which " Graf von Meran," " Narcissiflora " and 

 " Louis A. van Houtte," may be considered types. Typical forms of X R. mixtum 

 are "Murillo" with rose-colored flowers, "Virgile" with yellow flowers, "II 

 Tasso " with red flowers, " Milton " with white flowers, and " Racine " with pale 

 pink flowers. According to Millais (Rhodod. 213 [1917]) there are hybrids raised 

 by Vuylsteke between R. molle and Azalea altaclarense. These are unknown 

 to me. 



Rhododendron molle G. Don has been crossed with one or more 

 of the broad-leafed Rhododendrons and the oldest of these is: — 



X Rhododendron "Smithii aureum" Paxton, Mag. of Bot. IX. 79, 

 t. and fig. (1842). —Gard. Chron. II. 352 (1842). — Robinson, Fl. 

 and Sylva II. 152, t. (1904). — Bean, Trees and Shrubs Brit. hi. 

 II. 346 (1914). 



Rhododendron " Hardy Seedling " X Azalea sinensis Paxton, Mag. of Bot. IX. 79 



(1842.) 

 " Norbiton hybrids '' Hort. ex Masters in Gard. Chron. ser. 3, XIII. 665 



(1893). 

 Rhododendron sinense X Eurhododendron spec. Zabel in Beissner, Schelle & 



Zabel, Handb. Laubholz.-Ben. 379 (1903). 



I have given the parentage as set down by Paxton but Robinson says " between 

 a yellow form of the Chinese Azalea and Rhododendron caucasicum, the latter of 



