No. 547] GENETIC AL STUDIES ON (EN OTHER A 401 



size of the flowers both classes of hybrids presented 

 essentially the same types (petals 2.5-2.7 cm. long), 

 closely intermediate between those of the parents, but 

 the flowers of Class I were similar to those of Lamaick- 

 iana in the length of the stigma lobes, in their 4-angled 

 buds and in having red glands on their ovaries. In the 

 form and size of the capsules and in the deciduous habit 

 of the bracts Class II had the advantage of a closer 

 resemblance to Lamar ckiana. In the broader and some- 

 what crinkled leaves the advantage was very much in 

 favor of the plants in Class II, but in the coloration of 

 the glands on the stem the plants of Class I were 

 Lamarckiana-likB. The situation seems mixed and we 

 must await the outcome of the cultures as planned above 

 in the hope of some interesting conclusions. The writer 

 in selecting a representative of Class II (11.35La) as 

 more like Laniarckiaua than any other plant has laid the 

 greater emphasis upon the characters of foliage and 

 buds (in this plant stout and 4-angled), believing that 

 these characters of Lama rckimia are more important and 

 more difficult to obtain in hybrids than many of the 

 others. 



A description of this plant (11.35La), the F x hybrid, so 

 far obtained, most closely resembling 0. Lama) ckiana, 

 will now follow, arranged to bring out its important char- 

 acteristics in comparison with those of the parent species 

 and with Lamarckiana. 



Hybrid 11.35La 

 1. Rosette.— The rosette of this plant was unfortu- 

 nately mutilated by cut worms whieh destroyed the cen- 

 tral bud so that the shoots that grew to bear flowers were 

 all from side buds. The rosette, however, was similar 

 to that shown in Fig. 5 (11.35a), that is to say, it was 

 representative of the mass of the culture. My attention 

 was first attracted to this plant by the greater length and 

 breadth of the leaves upon the young side shoots and their 

 conspicuous crinkling, well illustrated in Fig. 10. As the 



