178 THE AZALEAS OF NOKTH AMEKICA 



Rhododendron luteum x speciosum. 



Azalea nvdiflora var. scintillans 1 Lindley in Bot. Reg. XVII. t. 1461 (1831). 

 Rhododendron nudiflorum var. scintillans Hooker in Bot. Mag. LXV. t. 3667 

 (1839). 



In the Botanical Register Mr. Gowen says: "This Azalea was raised at Highclere 

 in the same year with those already figured in previous parts of this work and is 

 a seedling from Azalea coccinea major impregnated by the pollen of Azalea pontica. 

 The flowers are bright pink with the narrow lobes of R. nudiflorum and with the 

 upper lobe of a pale buff color or nearly whitish." 



The following are probably of the same parentage: 



Rhododendron flavum var. ardens Sweet, Brit. Flow. Gard. ser. 2, IV. t. 306 



(1835). 

 Azalea pontica * coronaria fi. ardens De Candolle, Prodr. VII. 718 (1839). 



This form was introduced from Holland, according to Sweet, and he says that 

 it "is doubtless a production between R. flavum and one of the varieties of R. nudi- 

 florum." Judging from its bright scarlet flowers borne in a very large dense head 

 it is near R. speciosum and if not simply a form of that species it may very well be 

 a hybrid between it and R. luteum. 



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



331 (1836). 

 Azalea pontica * coronaria o. flavum De Candolle, Prodr. VII. 718 (1839). 



This is very similar to the preceding except that the flowers are orange-yellow 

 with a red tinge. It also was imported from Holland. 



Rhododendron luteum x viscosum = Rhododendron ornatum Sweet 

 Brit. Flow. Gard. ser. 2, II. t. 137 (1832). 



Azalea pontvca-rvhescens Gowen ex Sweet, I. c. (1832) as synonym. 

 Rhododendron viscosum 0. ornatum G. Don, Gen. Syst. III. 847 (1834). 

 Azalea viscosa * ornala De Candolle, Prodr. VII. 617 (1839). 



Sweet states that he received the specimen figured the end of May, 1830, and 

 that "the seeds were raised by Lord Carnarvon's gardener from Azalea viscosa 0. 

 rubescens, fertilized by A. pontica under Mr. Gowen's own inspection." 



Four varieties are distinguished and figured: 



a. speciosum, with reddish orange flowers (fig. 1). 



p. incarnatum, with pale pink flowers tipped with white, the upper lobe yellow 



(fig. 3; in the text by mistake as var. and fig. 2). 

 7. luteum with pale yellow flowers slightly tinged with blush, the upper lobe 



deep yellow (fig. 2; in the text by mistake as var. 3 and fig. 3). 

 t. roseum with pale rose flowers, the upper lobe with a large orange blotch 



(fig. 4). 



Rhododendron Mortieri x luteum (and partly viscosum or arbores- 

 cens) = Rhododendron gandavense Render, comb. nov. 



1 This name should not be used for this plant as a binomial designation 

 under Rhododendron, as there is already a R. scintillans Balf. f. & W. W. Sm. 



