470 CONSERVATIVE ORGANS. [LECT. IX. 



2. In the plaited (Plicata), the 

 leaf is folded up like a fan ; as ex- 

 emplified in many of the Palm tribe; 

 in the Birch, Betula alba, and La- 

 dy's-Mantle, Alchemilla. In the mar- 

 ginal cut, a. represents an unexpanded 

 leaf of Alchemilla alpina ; b. its trans- 

 verse section. 



Overlapping. Under this head are ar- 

 ranged those gems in which the margins of the 

 leaves overlap those within them, or opposite -to 

 them, without being rolled. It comprehends the 

 three following varieties. 



1 . The Imbricate (Imbricata), in which the 



edges of two opposite leaves touch each 

 other, embracing those within them, 

 which they cover like tiles. In some 

 instances the edges of the one leaf ex- 

 tend a little over those of that to 

 which it is opposed ; while in others 

 the opposed edges scarcely touch. This 

 variety is exemplified in Privet, Ligus- 

 trum vulgar e, and Lilac, Syringa vul- 

 garis, &c. In the marginal cut, a. 

 represents the opening gem of Lilac, 

 and b. its transverse section. 



2. The Equitant (Equitantia), in which 

 the leaf is so folded, that the two sides 



