PLATE 42 



Fig. 1. Very young stage; cotyledons still persist. 



Fig. 2. Early rosette stage. 



Fig. 3. Later rosette stage. 



Fig. 4. Nearly mature resette in a family showing a characteristic retrorse 

 rolling of the leaf margins. 



Fig. 5. Fully developed rosette, the stage in which measurements of length 

 of radical leaves were taken. 



[240] 



