CHAP. VIII. CBOSSED AND SELF-FERTILISED PLANTS. 295 



which all belonged to the new white-flowered tall variety, 

 yet in only half the pots did the self-fertilised plants flower 

 first, and in the other half the crossed plants. 



Viscaria oculato. The crossed plants were only a little taller 

 than the self-fertilised (viz., as 100 to 97), but con- 

 siderably more fertile, yet both lots flowered almost 

 simultaneously. 



Lathyrus odoratus (Second Generation). Although the crossed 

 plants were to the self-fertilised in height as 100 to 88, yefc 

 there was no marked difference in their period of flowering. 



Lobelia fulyens (Second Generation). Although the crossed 

 plants were to the self-fertilised in height as 100 to 91, yet 

 they flowered simultaneously. 



Nicotiana tabacum (Third Generation). Although the crossed 

 plants were to the self-fertilised in height as 100 to 83, yet 

 in half the pots a self-fertilised plant flowered first, and in 

 the other half a crossed plant. 



These three lists include fifty-eight cases, in which 

 the period of flowering of the crossed and self-fertilised 

 plants was recorded. In forty-four of them a crossed 

 plant flowered first either in a majority of the pots or 

 in all ; in nine instances a self-fertilised plant flowered 

 first, and in five the two lots flowered simultaneously. 

 One of the most striking cases is that of Cyclamen, in 

 which the crossed plants flowered some weeks before 

 the self-fertilised in all four pots during two seasons. 

 In the second generation of Lobelia ramosa, a crossed 

 plant flowered in all four pots some days before any 

 one of the self-fertilised. Plants derived from a 

 cross with a fresh stock generally showed a very 

 strongly marked tendency to flower before the self- 

 fertilised and the intercrossed plants of the old stock ; 

 all three lots growing in the same pots. Thus with 

 Mimulus and Dianthus, in only one pot out of ten, and 

 in Nicotiana in only one pot out of sixteen, did a self* 

 fertilised plant flower before the plants of the two crossed 

 kinds, these latter flowering almost simultaneously. 



