KOOT-CUTTINGS AND CHIMAERAS 11. 

 By W. BATESON, M.A., F.R.S. 

 (With Plates XIII and XIV.) 



Bouvardia. 



In a former paper^ I recorded the production of the red-flowered 

 variety Hogarth from the roots of Bouvardia Bridesmaid which has 

 pinkish white flowers. This behaviour is perfectly consistent. At various 

 times we have raised from Bridesmaid 29 root-cuttings (besides others 

 not counted), which in every case bore Hogarth flowers. Very rarely a 

 streak or flake of pinkish white has occurred on these flowers such as 

 I have seen on other varieties of Bouvardia (e.g. Cleveland and Lemoinei) 

 but they are exceptional. Perhaps one or two such flakes are seen in 

 a season among our collection, and they do not come with any special 

 frequency on the derived Hogarths. 



From Hogarth ex Bridesmaid's roots 64 root-cuttings have been raised, 

 all Hogarth except one luhicli was Hogarth colour but single- jioiuered, 

 whereas Hogarth and Bridesmaid are fully double. This single had 

 anthers which dehisced containing much pollen, in microscopical appear- 

 ance all bad. Singles arising as root-cuttings from double Bouvardias 

 have often been recorded in literature, especially from Alfred Neuner, 

 but this is the only instance observed here. A. Neuner has only given 

 us three root-cuttings which have flowered as yet, both double, exactly 

 like the parent plant. 



From Hogarth ex Hogarth ex Bridesmaid 63 normal Hogarth have 

 been raised as root-cuttings and from these again have come 13 normals. 



From the single Hogarth {ex H. ex B.) we have raised 6, all singles 

 like the immediate parent. 



The following kinds have given root-cuttings which on flowering were 

 exactly like the parent: 



A. Neuner, white double (3). 

 elegans, scarlet single (15). 



1 Journ. of Genetics, 1916, Vol. vi. p. 75. 



