203 LOCK : 



very little trace of the influence of the latter parent, except in 

 the colour of tlie flowers (mauve). The plant was covered 

 with the soft, sticky, glandular hairs so common in ths genus, 

 and specially characteristic of N. alata. 



Nine hybrid plants were raised and flowered in the open, 

 and were in all respects closely similar to one another. Two 

 others raised under glass differed chiefly in the very much 

 reduced growth. In form and habit tho hybrids occupied 

 an intermediate position between the two parents, though 

 considerably exceeding either in stature. The most interesting 

 point about these hybrids is that they exhibited side by .side 

 a mixture of the two kinds of hairs characteristic of the two 

 parent species. Each kind of hair, however, was piesent in 

 considerably smaller numbers than on the parents. 



In the case of the similar phenomenon described by Mac- 

 farlane* upon tlie hybrid between Ribes Grossularia and R. 

 nigrum, the two kinds of hairs were said to be about half 

 as large upon the hybrid as upon the parents, but appear, 

 from the published figures, to be quite as numerous as in 

 either. 



In the hybrid tobacco the hooked bristles w^re decidedly 

 smaller than those of N. angustifolia. But the glandular 

 hairs appeared to be of nearly the same size as those of the 

 N. alata hybrid. 



The discovery of a similar phenomenon in a fertile hybrid, 

 so as to allow of the examination of a further generation, may 

 be expected to lead to results of considerable theoretical 

 interest, but I am not aware that any example of the kind is 

 known at present. 



N. paniculata x langsdorfli. (Plate 21.) 



The most remarkable point about this hybrid was the 

 extreme slowness of its growth. Sown under glass on March 

 12, 1907, at the same time as the parents, the plants never 

 reached a suitable size for transplanting to beds in the open 

 air. The first flower was produced on October 5. At this 

 date several plants still showed no disposition to blossom. 



* Trans. Royal Soc, Edin., I'^d'!, p. 274. 



