HYBRIDS 183 



of the late flowering variety of Azalea viscosa, called by nurserymen A. rubescens 

 major." The flowers are large white, slightly bordered pink, with a faint yellow 

 tinge at the base of the lobes, and with the upper lobe distinctly dotted yellow 

 and the tube pinkish outside. The gradually dilated tube and the yellow tinge 

 and the spotted upper lobe indicate the influence of R. sinense and the white 

 color and hirsute tube of the corolla and the delicious fragrance the influence of 

 B. viscosum. 



Azalea sinensis alba Van Houtte in Fl. des Serres, XX. 151. t. 2143-44 (1874). 



Van Houtte gives no description and no hint of the origin of the plant save the 

 remark that it is far removed from the true A . sinensis. It is possibly the same form 

 of which a plant was received by the Arnold Arboretum from Koster and Son in 

 1904 under the name Azalea chinensis alba grandiflora. 



Rhododendron ? gandavensis x molle. 



Azalea sinensis var. Bylsiana Morren in Ann. Soc. Agric. Bot. Gand, I. 278, 

 t. 27 (1845). 



This form was raised by the Ghent horticulturist Byls from seeds of A. sinensis. 

 It is apparently a hybrid and has large white flowers edged pink and the upper 

 lobe with a large yellow blotch. This is not to be confused with R. Bylsianum 

 Henderson, III. Bouquet, 1. 1. 18 (1857-59), a hybrid form of Eurhododendron. 



Azalea sinensis var. macrantha Spae in Ann. Soc. Agric. Bot. Gand, III. 127, 

 t. 122 (1847). 



This form is of the same origin as the preceding; its flowers are white tinged 

 with pale rose and marked with a large yellow blotch dotted orange. As a similar 

 form is mentioned A. sinensis var. versicolor raised by Buyck-Vander Meersch. 



Rhododendron japonicum x nudiflorum. 



Azalea nudiflora x sinensis Van Fleet in U. S. Dept. Agric. Bur. PI. Indust. 

 CCXXIII. 17 (1911). 



"Vigorous hybrids with profuse cream, rose and salmon colored blooms," raised 

 by Dr. W. Van Fleet at Little Silver, N. J., and presented to the Plant Introduc- 

 tion Garden in Chico, California, in 1910. The parent species called Azalea sinensis 

 is probably R. japonicum, for the former is not known to have been in cultivation 

 in this country before 1910 except young seedlings at the Arnold Arboretum, 

 raised in 1908. 



Rhododendron japonicum x molle = Rhododendron Kosterianum 

 Schneid. See page 97. 



Rhododendron gandavense x Kosterianum = Rhododendron mix- 



tum Wilson. See page 98. 



Azalea rustica flore-pleno Vandevoorde in Rev. Hort. Beige, XIX. 232 t. (1893). 

 Azalea mollis fl. pleno "Virgil" Reiter in Gartenwelt, XV. 493, fig. (1911), 



habit figure. 

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



fig. (habit) (1917). 



