No.532] GENETICAL STUDIES ON (ENOTHERJ 223 



2. Progeny from hybrids 9ba, 9bb, and 9be, grandiflora 

 D X biennis B. These three hybrids (Davis, '10, p. 114) 

 presented the parental characters well blended. They 

 were essentially similar to Lamarckiaita in flower struc- 

 ture and inflorescence, but differed in foliage and habit, 

 the leaves on the lower portion of the stem being but half 

 the length of those similarly placed on L<t m<< rcliaita and 

 with only slight traces of crinkles; the habit was biennis- 

 like. 



From about 350 seedlings of hybrid !M>a, 7b" plants were 

 brought to maturity, being selected as representative 

 types of the rosette stages. A small proportion of the 

 rosettes was dwarfed and the nine selected representa- 

 tives of this type developed small plants 1-2.5 dm. high, 

 generally without side branches; these did not flower. 

 The normal rosettes varied greatly in the forms of leaves 

 and extent of the red coloration, certain ones being dis- 

 tinctly more like the respective parents of the cross than 

 the average; these differences were maintained in the 

 mature plants, but to a less marked degree. The culture 

 in general presented a habit more gr<mdiflora-\jke than 

 biennis-Y\ke, but all of the characters remained blended, 

 although there was a considerable range of variation in 

 flower structure and foliage. While a number of the plants 

 were similar to the hybrid parents, none proved to be 

 appreciably nearer to Lamarckiana. 



There were about 550 seedlings of hybrid 9bb, from 

 which 93 plants, selected as representative rosettes, were 

 brought to maturity. Relatively few dwarf rosettes were 

 present in this culture; eleven of these being selected 

 grew into plants 1 4 dm. high, small leaved and without 

 prominent side branches, the larger of the dwarfs develop- 

 ing small biennis-like flowers. The culture in general was 

 more uniform than the preceding, but certain rosettes and 

 mature plants were noticeably more like one or the other 

 of the original parents than the average, which presented 

 these parental characters well blended. The foliage of 

 the culture was distinctly crinkled so that the plants re- 



