VARIETIES OF PINNATE LEAVES. 175 
ing this kind of venation is separated into distinct portions or 
leaflets, it is termed pinnate (figs. 357-360) ; and the leaflets are 
then termed pinne. The leatlets are arranged either in an 
opposite or alternate manner along the sides of the rachis or 
Fie. 359. Fig. 361. 
Fic. 360. 
Fie. 3862, 
Fig. 359. Interruptedly pinnate leaf of the Potato (Solanum tuberosum ).— 
Fig. 360, Lyrately pinnate leaf, — Fig. 361. Bipinnate leaf of a species of 
Gleditschia. — Fig. 362. A tripinnate leaf. Some of the leaflets are, how- 
ever, only bipinnate. 
common petiole in pairs, and according to their number the 
leaf is said to be wnijugate or one-paired, as in several species 
of Lathyrus (fig. 385); bijugate or two-paired ; trijugate or three- 
