24 Russell— Comparison of the Structure of Hybrid 



Set 3. S. Sledgei, S. Drummondii, and S. areolata 



S. Sledgei (PI. II, fig. 6) has an upright, slender pitcher, 

 slightly inflated in its upper half, slightly constricted at the 

 rim. Average pitchers are 55-65 cm. high. The pitcher of 

 S. Drummondii (PI. I, fig. 4), it will be remembered, increased 

 gradually in width, up to the rim. S. areolata (PI. II, fig. 7) 

 is about as high as 5. Sledgei— 55-65 cm. The rim is not con- 

 stricted as in S. Sledgei, nor is it so expanded as in 5. Drum- 

 mondii. The fused lamina extends but little in these three 

 forms. It is about 4 mm. wide in 5. Sledgei, while in 5. Drum- 

 mondii it is very narrow — only 2 mm. wide. S. areolata shows 

 it about as in S. Drummondii, or slightly wider. 



The lid in 5. Sledgei is ovate-cordate, with a straight margin. 

 In its median portion it is prolonged into a tip. S. areolata 

 shows a lid intermediate in shape between the ovate lid of 

 5. Sledgei, and the orbicular frilled lid of 5. Drummondii. There 

 is a slight tip process. 



The pitchers of S. Sledgei are green, veined with crimson 

 over the upper portion and the lid region. There is also a 

 ruddy variety with deep crimson lid and upper tube. S. Drum- 

 mondii, of the type described as one of the parents of S. Moorei, 

 has a green pitcher marked on the lid and upper tube with 

 white areolations and reddish veinings. S. areolata has more 

 pronounced reddish purple vein markings than S. Drummondii. 

 The white areolations are reproduced over the upper lid and 

 pitcher areas, but are fainter than in 5. Drummondii. Where 

 the 5. Drummondii parent is of the atropurpurea type, the 

 hybrid is very richly colored with purple lid and white mark- 

 ings. 



Outer Lid Surface 



In S. Sledgei (PI. Ill, fig. 13) the epidermal cells are longer 

 than broad, with angular walls. There are numerous stomata 

 distributed equally over the epidermal surface, averaging six 

 to a field. Glands are sparse — one to a field on this outer sur- 

 face. There are but few hairs, and these are extremely short. 

 In S. Drummondii (PI. Ill, fig. 11) the cells are rounded, swollen; 

 glands and stomata are distributed in limited areas between 

 the areolations. In the hybrid (PI. Ill, fig. 14) the epidermal 

 cells are inclined to have rounded walls, slightly swollen into 



