166 VEINS AND TUBS OF LEAVES. 



down, as Reseda luiea, t. 321, and 

 Ilia crispa (more properly undulata*) 

 Curt, Mag. t. 599- 



Crispum, curled, when the border of the 

 leaf becomes more expanded than the 

 disk, so as to grow elegantly curled and 

 twisted, which Linnaeus considers as a 

 disease. Malva crispa, Ger. em. 931, 

 is an example of it, and may probably 

 be a variety of M. verticillata, Jacq* 

 Hart. Find. v. 1. t . 40. 



Concavum, hollow, depressed in the middle, 

 owing to a tightness in the border, as 

 Ci/amus Nchunbo, Exot. Hot. t. 32. 



Vcnosuffl) veiny, when the vessels by which 

 the leaf is nourished are branched, sub- 

 divided, and more or less prominent, 

 forming a network over either or both 

 its surfaces, as Cratcegus, or rather 

 Fyrus, torminalis, Engl. Bot. t. 298, 

 and Verbascum Lychiiitis, t. 58. 



Nervosum, or costatum^ ribbed, when they 

 extend in simple lines from the base to 

 the point, as in Cypripediuni Calceolus, 

 t. 1, the Convallarice, t. 279 and 280, 

 Stratiotes alismoides, Exot. Bot. t. 15, 

 * Salisb. Hort. 37- 



