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THE AMEBIC AN NATURALIST [Vol. XLIV 



the grandiflora-like hybrids, and thicker in texture. The 

 plants were shorter (.8-1.1 m. high) and the habit 

 biennis-Yike in being sparingly branched, the side 

 branches arising from near the base of the plant and 

 being almost as long as the main stem. The flowers were 

 intermediate between the parent types, but exhibited a 

 somewhat greater range of measurements than those of 

 the grandiflora-like crosses. 



In three of these biennis-Yike hybrids (9ba, 9bb and 

 9bc) the flowers and inflorescences presented a structure 

 so similar to that of Lamarckiana that they matched in 

 all essentials the branches on certain Lamarckiana plants 

 in the garden. The differences in the form of the bracts 

 and parts of the flower were of the sort that can be ob- 

 served in any reasonably large culture of Lamarckiana. 



There were, however, striking differences between 

 these three hybrid plants and Lamarckiana with respect 

 to their foliage and habit of growth. The leaves on the 

 lower portion of the stem were only 9-11 cm. long, about 

 half the length of leaves similarly placed on Lamarck- 

 iana, and there were only slight traces of the crinkles 

 so characteristic of Lamarckiana. The biennis-like habit 

 of putting out long side branches from near the base of 

 the plant was also very different from the usual habit of 

 Lamarckiana in which the prominent side branches are 

 more regularly distributed along the main stem. 



These plants formed such transient rosettes in the hot- 

 house that no conclusions could be drawn as to what 

 would be their characters if allowed to develop more 

 slowly. Seed was produced in abundance by self-polli- 

 nated flowers. Less than 50 per cent, of the pollen was 

 abortive, the normal pollen, except for an occasional 4- 

 lobed grain, was entirely 3-lobed. 



General Considerations 

 While it is impossible to draw broad conclusions from 

 these hybrids, which have as yet been observed only in 

 the F 1 generation, a number of interesting points may be 

 noted : 



1. The characters of the parents, as presented in each 



