HYBRID RHODODENDRONS. 



251 



Hence the source of the yellow colour in the orange in Monarch 

 was this last-named grandparent. 



Princess Alexandra (white) x B. Brookeanum, var. gracile 

 (straw) = Taylori (pink) ; but Princess Alexandra is the off- 

 spring of Princess Koyal (pink). 



Princess Frederica (yellow with orange anthers) x B. multi- 

 color (lemon) = No. 339 (yellow border, but pink throat). The 

 pink here is derived from the grandparent Princess Koyal. 



B. multicolor (lemon) x Princess Beakice (cream and pink 

 tinge) = No. 335 (dark rose). In this case not only has the 

 yellow disappeared, but the red derived from B. Lobbii, through 

 Duchess of Edinburgh (the male parent of Princess Beatrice), 

 has reappeared and become pronounced. 



Effects of Form in Crossing. 



Form of the Original Species {large-flowered). — Cor. border 

 large and tube short, lobes reflexed — B. Teysmannii (fig. 43, /). 

 Cor. border large and tube short, lobes straight — B. Brookeanum 

 (fig. 43, a) and B. javanicum (fig. 43, c). Cor. border small and 

 tube long — B. jasminiflorum (figs. 38 and 43, c), and B. Lobbii 

 (fig. 43 6). 



Small-flowered Species. — Cor. border broad, tube funnel- 

 shaped — B. multicolor (fig. 43,^). Cor. border small, tube straight 

 — B. malayanum (fig. 43, g). 



The long straight tube oiB. jasminiflorum is traceable through 

 most of the progeny of Princess Eoyal and Princess Alexandra, when 

 crossed with B. Brookeanum, but when crossed with the short- 

 tubed B. javanicum, it approximates thai of the latter species. 

 A similar result follows when they are crossed with B. multicolor. 

 The short-tubed B. javanicum similarly reduces the larger one 

 of Princess Frederica, as in Princess Christian. 



On the other hand, B. javanicum (short-tubed) (fig. 43, e) x 

 Duchess of Edinburgh (long-tubed) (fig. 44, T) = Militare (long- 

 tubed). The long tube is derived from B. Lobbii (fig. 43, b), 

 which is strongly curved and ascending. A slight curvature is 

 retained in the hybrids, but disappears in the second and subse- 

 quent generations. 



With regard to the form of the small-flowered B. multicolor, 

 whenever this species is crossed with any other or a descendant 



H 2 



