HYBRID RHODODENDRONS. 



255 



Taylori. These contain 2jas., jav., Brook., and Teys. In these 

 B. Brooheanum predominates in the slender tube and paleness 

 of the colour. 



In not a single instance is the original form B. jasmini- 

 florum traceable either in the corolla or the foliage. 



Practical Results. 



From the preceding observations a few practical results • 

 may be noticed. 



1. It has often been observed that when a plant with coloured 

 flowers succeeds in throwing up a seedling with white flowers, 

 the second generation from the latter may be remarkable for a 

 great variation of tints. This, however, does not apply in the 

 present instance, as the only white form is a true species {B. 

 jasmini florum). (Fig. 38.) 



2. When a flower with a composite colour, as orange, is 

 crossed by white, then the next generation may have the colours 

 separated, shades of red or of yellow being the result. This is 

 true, either when crossed by a true species [B. jasminiflorum) or 

 a cross (Princess Alexandra). (Fig. 39.) 



3. If rose or pale red, and pale or dark yellow be united, 

 delicate pinky-cream coloured, as well as primrose-yellow tints, 

 are produced. 



4. It is generally preferable to employ the pollen of a true 

 species when a crossed offspring is fertilised. 



5. If it be required to enrich a colour, the plant with the 

 richer tint should be used as the male parent. 



6. Reciprocal hybrids are practically identical. 



7. Pollen from short stamens tends to dwarf the size of 

 the offspring in Bhodo&endrons. This was discovered by 

 Mr. McNab, but is scarcely applicable to the present species, 

 as there is little or no difference in the lengths of the 

 stamens. 



8. From the history of the Balsamceflorum section (p. 256), 

 one may gather the usefulness of self-fertilisation in fixing, but, 

 of course, not in creating, double forms. Conversely, the 

 offspring of a semi-double flower crossed by any single one 

 was invariably single, the latter being prepotent over the semi- 

 double form. 



