462 THE AM EE WAN NATURALIST [Vol. XLVII 



There was more evidence of segregation towards the 

 respective parents, but the same progressive advance in 

 flower size. Many plants bore flowers as large as or 

 larger than those of the grandiflora parent, while no plant 

 presented flowers as small as those of the biennis parent. 

 The foliage was extremely varied, ranging from lanceo- 

 late leaves to broadly elliptical or ovate leaves with well- 

 defined crinkles. 



A larger number of remarkable forms appeared in this 

 culture, 11.42 (see Davis, '12a, p. 415), than in the one 

 from the plant 10.30La, forms that would rank as types 

 specifically distinct from either parent of the cross and 

 from the F x hybrid plant 10.30L6. Among these we shall 

 refer to (1) the dwarf type 11.42r (Fig. 5), (2) a small- 

 leaved type 11.42/ (Fig. 6), (3) a large-flowered type with 

 large crinkled leaves 11.42# (Fig. 8), rather common and 

 fairly representative of the mass of the culture, (4) a 

 medium-flowered type remarkable for its broad-much- 

 crinkled leaves 11.42Z (Fig. 14), and (5) a plant with very 

 narrow leaves and very small flowers, anthers sterile 

 11.42; (Fig. 15). 



The same problem lay before me in the study of the F : . 

 generations from these types in the F 2 of the plant 

 10.30L&, as in the family which has just been described 

 from the sister plant 10.30La. Would the extreme types 

 such as the dwarfs hold their characters, thus proving to 

 be homozygous, and would selfed plants more or less 

 representative of the mass of the F 2 repeat in their F 3 

 generations something of the history of the F 2 ? 



Of the 147 dwarf rosettes in the F 2 from 10.30L& there 

 were brought to maturity 90 plants. These constituted, 

 as stated above, a very uniform group with characters 

 well shown in Fig. 5. One of these, 11.42m, was selected 

 and selfed to become the parent of an F 8 generation. 

 The contents of one capsule, 196 very small seeds, were 

 sown and gave culture 12.59, comprising 66 rosettes, all 

 similar and dwarf. One of these rosettes is shown in 



