28 Russell— Comparison of the Structure of Hybrid 



part. In color, in S. fiava they are yellowish membranous, 

 with green veinings. Those of 5. purpurea are reddish, or 

 green with a reddish margin. In S. Catesbaei the bracts are 

 reddish with a green tip. 



The sepals of 5. flava are 4 cm. long by 3 cm. broad. They 

 are ovate and greenish yellow. Stomata are frequent, and the 

 numerous glands are massed towards the edges and tip of the 

 sepals on the outer side. On the inner, or morphologically 

 upper, surface the glands and stomata are less frequent than 

 on the outer side, but distributed in the same manner. 



In S. purpurea the sepals are 3 cm. long, ovate as in 5. flava 

 and red in color. Glands are not so numerous as in 5. flava, 

 but distributed along the margins as above. The sepals of 

 •S. Catesbaei are 4 cm. long, ovate, green tinged with rosy pink, 

 or with red veinings. Glands and stomata are more numerous 

 than in S. purpurea, distributed as before. 



The petals in 5. flava are 7-8 cm. long, with the proximal 

 portion not wider than the distal expanded part. The expanded 

 portion at its lower third forms a cuneate tip characteristic of 

 5. flava. In color the whole petal is a flavous yellow, the pig- 

 ment being due to yellow chromoplasts. The constricted por- 



Fig. 29. Outline drawings of petals of Sarracenia flowers X }i. See text 



for description. 



tion of the petal (fig. 29, b) is rolled over rather deeply. Glands 

 and infrequent stomata are distributed alightly behind the 

 tip of the petal, and along several of the median veins. At 

 the region of the constriction they become very numerous. 

 In this area too, the epidermal cells become swollen into rounded 



