30 Russell— Comparison of the Structure of Hybrid 



at least in all the greenhouse specimens, a larger flower than 

 those of the parents. They are 7 cm. long and 13-15 cm. across. 

 The bracts are reddish green. 



The sepals are deep crimson in S. Drummondii, ovate in 

 shape, measuring 4-5 cm. in length. Those of 5. Moorei are 

 of like size, but show an intermediate coloring and shape. They 

 are reddish pink above, and yellow beneath, and are rather 

 narrower than the sepals of S. flava (35). Stomata and glands 

 appear as before at the tip and along the sides of the sepals. 



The petals are interesting in relation in this series. They 

 are 6-7 cm. long in 5. Drummondii (fig. 29, d) and have a basal 

 segment which is rhomboidal in shape, and much wider than 

 the "banner" below. The margin of the petal is rolled back 

 strongly at the constriction ; the banner portion is oval in shape 

 and the whole petal is colored a rich deep crimson, due to a 

 dissolved crimson pigment, except at the extreme base, where 

 the petal is green. The epidermis of the petal, like the outer 

 epidermis of the pitcher, is swollen into papillae, which become 

 especially prominent in the constricted area. There are few 

 glands scattered at the lower part of the petal, and up the me- 

 dian veins. There are none in the constricted area of the petal, 

 where they are so numerous in 5. flava. 



In 5. Moorei (fig. 29, e) the petals are intermediate in color 

 and shape. The basal portion is wider than in S. flava and nar- 

 rower than in 5. Drummondii. The lower portion of the petal 

 is pointed, somewhat suggesting the cuneate tip of 5. flava, but 

 rounds out above more like 5. Drummondii. In color the 

 petals are light at the base — a yellowish green, becoming a 

 peculiar maroon color below the base on the outer side of the 

 petal and yellow within, due to combined crimson dissolved 

 pigment and yellow chromoplasts of S. Drummondii with the 

 yellow chromoplasts of S. flava. The glands are less numerous 

 than in S. flava, but are distributed in the same way, toward the 

 tip, up the median veins and over the constricted area. 



In S. Drummondii, the style is flushed with crimson over 

 its outer surface; while in S. flava it is yellow. In S. Moorei 

 the style is yellowish, with faint red markings. 



The hairs of the umbrelloid style of S. Moorei are longer and 

 stronger than those of the parents. 



