Horticultural Varieties Arisen Suddenly. 101 



in the crop thus raised that the plant whicli bore the 

 flower head shown in Fig. 15 appeared. The color was 

 dark carmine red, not that of red lead. The flower heads 

 were all fistulous from the beginning of June until well 

 into October; but the later flowers manifested the ab- 

 normality in varying degrees. Either the base only of 

 the tube was closed ; or only some of the ray florets had 

 the form of a tube. The plant had to be left to free 

 crossing with its neighbors so that no observations of 

 real value as to its constancy could be made. Neverthe- 

 less this was pretty considerable, for, from the seeds of 

 my fistulosa I raised 43 plants in 1895 of which 25, that 

 is to say more than half, had the characters of the new 

 variety. 



The origin of Chelidonium laciniatuin from C. inajus 

 was described in detail in the first volume (p. 189, Figs. 

 36 and 37) ; where a series of other cases will also be 

 found. Verlot (loc. cit., p. 34) describes Ageratuni 

 cocruleuni nanum as a novelty which is sometimes sterile, 

 but sometimes occurs as a fertile and constant variety. 

 Verbena hybrida, *'a fleur couronnee" arose about 1889 

 from the variety "a fleur d'auricule," it immediately 

 proved constant and after only two years was put on the 

 market by E. Fourgeot of Paris. ^ Robinia Pseud-Acacia 

 rosea was found by Decaisne in a crop of ordinary 

 Acacias; and Gleditschia sinensis inerniis arose in the 

 same way, as also did Sophora japonica pendula which 

 a])])eared in i\I. Joly's nursery garden in Paris about 

 1800.- In 1860 a new strawberry "Reus I'on Zuidw\k'' 

 appeared in Boskoop. Its leaves and fruits were larger 



^ See his Catalogue for 189T. 

 Verlot. loc. cit., pp. 59. 92. 93. 



2-ir 



