6 



J. M. Macfarlane. 



Sarraceniaceae. 



Toward the middle or latter part of the first complete season of growth, decided 

 specific characters are indicated. The leaves of S. purpurea and S. psittacina become 

 increasingly spread out, tili those of the latter assume a horizontal position; both also 

 become crimson-veined and flushed with crimson if sun exposed. The latter species 

 begins to show small pale areolae over the top of the pitcher, that is now strongly 

 contracted and overarched, so as to bring the orifice into a vertical position. The 

 lid in S. purpurea has become vertical, or slightly inclined backward, and shows a 

 wavy margin. Pitchers of S. minor exhibit faint areolae over the posterior top of 

 the tube. In S. Drummondii similar areolae äppear, while the lid becomes erect, 



Fig. 3. Sarraeenia psittacina Michx. a scale leaves, b pitchered leaves, e laminar phyllodia, 



d flower. (Original.) 



and its margins frilled. In the other species less striking modifications are shown. 

 But in all, one important growth development consists in the striking increase of the 

 ventral laminar wing, which from being a mere line or ridge in the early seedling 

 leaf, has now expanded into a prominent median Aap, that is continuous from the 

 upper part of the cylindrical solid petiole to the pitcher orifice. This corresponds 

 to the similar wing in Darlingtonia, and results from fusion of the two free laminar 

 wings seen in Heliamphora (Fig. \Bc 1 Cc) , as histological evidence will show. It 

 attains its greatest relative size in the pitchered leaves formed during late summ er in 

 S. purpurea and S. psittacina (Fig. 3c). Thus in a large leaf of the former, that 

 was 26 cm long, the pitcher was 5 cm aeross, while the wing was 6 cm. Greatly 



