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THE AMERICAN NATURALIST [Vol. XLVII 



parent plant 10.30L5, but stood close to the center around 

 which the mass of the F 2 culture varied. 



From this plant, 11.42# (Fig. 8), the contents of two 



capsules, about 900 seeds, were sown (culture 12.56) and 

 377 rosettes developed. Among- the rosettes a group of 

 20 dwarfs very shortly denned itself. The characters of 

 the dwarfs are illustrated in Fig. 9, 12.56ra, where they 

 may be compared with those of a normal rosette, 12.56a, 

 shown above. The same sort of contrast is here exhibited 

 as that illustrated by Fig. 7 for the culture from 11.42/. 

 By the side of the dwarf 12.56ra is again figured the 



