234 The Pedigree Families. 



2. That every example of nihrinervis that arises in 

 a family of another kind is capable of producing per- 

 fectly constant progeny. 



IV. 0. ohlonga. The seedlings of this species can 

 first be recognized as such at the appearance of about the 

 sixth leaf, that is a little after 0. lata and O. nanella and 

 consideral)ly earlier than 0. rubrinervis and 0. scintil- 

 laiis. The leaves are narrow and with long stalks ; the 

 transition from the leaf to its stalk is not gradual but 

 abrupt, and the broad and pale veins have a reddish 

 tinge underneath. 0. ohlonga can only be recognized 

 uniformly early when the plants among which it appears 

 are grown sufficiently far apart, but if the undoubted 

 examples of ohlonga are removed from time to time more 

 examples of it will be found as a result of the additional 

 space put at the disposal of the plants. 



The typical form of the leaf, to which we have re- 

 ferred, was maintained in the rosettes that were planted 

 out. Some of the plants bore stems in the first year, 

 others turned out to be biennials. In both cases the plants 

 reach a moderate height only, rarely attaining a meter 

 in height and being very much smaller than plants of 

 Lamarckiana grown under identical conditions. The 

 annual forms branch but little, and the branches them- 

 selves remain short. The terminal spikes are thickly 

 covered with flowers and buds ; the flowers themselves 

 are smaller than in 0. Lamarckiana and develop small 

 fruits which contain verv little seed. The biennial forms 

 branch more, and bear plenty of pollen ; they form short 

 1)ut stout fruits which contain abundance of seed. 



Towards the end of their flowering period the oh- 

 longa plants can be recognized from quite far off by the 



