RemarJiS on Qytisus Addmi. 59 



Here follows a list of the articles in which the Cytisus Adam? 

 is treated of in our Annals. 



1. Note on a new Cytisus, by M. Prevost, vol. vii. p. 93. 



2. Note on this note, at the end of the same article, by 



Poiteau, p. 95. 



3. Physiological notice on the Cytisus Adam/, by Poiteau, 



vol. X. p. 1 1. 



4. New observations on the Cytisus Adam/, by M. Camuzet, 



vol. xiii. p. 196. 



5. Considerations on vegetable tissue, with respect to the 



orange called the Bizarrerie, by M. O. Leclerc, vol. xviii. 

 p. 302. 



6. New observations on the Cytisus Adam/, by Poiteau, 



vol. xviii. p. 6. 



The Cytisus Adam/ has smooth leaves and branches like the 

 Cytisus alpinus, which we call the sweet-scented cytisus, but the 

 flowers are buff (chamois), not so large, and less regular than 

 those of either. Sometimes the C. Adam/ produces flowers half 

 reddish yellow ; sometimes one of its buds produces a true 

 branch of C. iaburnum, with pubescent leaves, and long bunches 

 of yellow flowers exactly like the species, and seems inclined to 

 return to its type. Hitherto nothing has prevented our con- 

 sidering C. Adam/ to be a hybrid of C. jLabiirnum, of which 

 the father is not known ; but here is a difficulty which puzzles 

 us. This same C. Adam/ produces also, besides one or more 

 branches of C. Z/aburnum, branches of Cytisus purpureus, which 

 remain small and slender, the leaves of which are small and 

 smooth, and the flowers, instead of being in long pendulous 

 bunches, are in pairs (geminees) and axillary, as in their na- 

 tural type or natural species, only the flowers are rather larger 

 than in their type, but they have their violet purple colour. 

 Observe, that these branches of C. Z/aburnum and of C. pur- 

 pureus never proceed from casual buds (bourgeons adventifs), 

 but from eyes naturally predisposed on the branches of C. Adam/. 

 It has happened three or four times, that, in a graft which had 

 only two eyes, one has produced C Adam/, and the other 

 C. purpureus. 



There is now to be seen at M. Berlin's, nurseryman at Ver- 

 sailles, a cytisus which has these three species at once on the 

 same root. To explain this phenomenon, we must suppose that 

 the elements of three species circulate separately under the bark 

 of Cytisus Adam/, and that each of them bursts forth at different 

 places ; and that the elements of Cytisus Z/aburnum bursting forth 

 oftener than the elements of Cytisus purpureus, they must be 

 either more active or more abundant. This being admitted, it 

 may be asked how these three elements are united under the 



