VEINS AND RIBS OF LEAVES. 167 



and Roxburghia liridijlora, t. 57. The 

 greater clusters of vessels are generally 

 called nervi or costce, nerves or ribs, and 

 the smaller vencE, veins, whether they 

 are branched and reticulated, or simple 

 and parallel. 



Aveniiim, veinless, and eiierve, ribless, are 

 opposed to the former. 



Tri/icrve,/. 90, three-ribbed, is applied to a 

 leaf that has three ribs all distinct from 

 the very base, as well as unconnected 

 with the maro-in, in the manner of those 

 many-ribbed leaves just cited, as Blake a 

 trinerv'is^'. Curt. Mag. t. 451. 



Basi ti'iuerve, /. 91, three-ribl>ed at the 

 base, is when the base is cut away close to 

 the lateral ribs, as in Burdock, Arctium 

 Lappa, Engl Bot. t. 1228, Tussilago^ 

 t. 430 and 431, and the Great Annual 

 Sunflower. 



Triplinerve,f,9'i, triply-ribbed, when a pair 

 of laro-e ribs branch off from the main 

 one above the base, which is the case in 



* Authors incorrectly use the termination trinervius, 

 trinervla, Sec. for the more classical trinervis, (ririervCf 

 e/ierviSf enerve. 



