THE LEATES. 17 



Awl-shaped or Subulate (Fig. 72.)? long, cylindrical at the 

 base, and tapering to a point. 



Hair-shaped or Bristle-shaped) the same, but more slender. 



Hollow or Tubular, more or less cylindrical and empty. 



Jointed or articulate, divided into cavities by transverse par- 

 titions. 



Two-edged, Trigonal, Tetragonal, Three-sided, or Three- 

 edged, Four-sided, &c. 



With respect to duration, Leaves are 



Caducous, when they fall soon after their development. 

 Deciduous, when they fall before the next spring. 

 Marcescent, when they wither before falling. 

 Persistent, Permanent, or Evergreen, when they remain 

 longer than a year. 



Compound Leaves are named as follows .- 



Compound Leaves are such as present a greater or less 

 number of distinct parts connected by a common stalk. The 

 distinct parts are named Leaflets or Folioles, and the divisions 

 of the common stalk are named Partial Stalks. The following 

 are the principal kinds of Compound Leaves : 



Fingered or Digitate (Fig. 73), when several leaflets rest 

 upon the summit of a common stalk. 



Binate (Fig. 74.), when two leaflets rest upon a common 

 stalk. 



Ternate (Fig. 75.), when three leaflets rest upon a common 

 stalk. 



Quinate, when the leaflets are five. 



Pedate (Fig. 76.), a ternate leaf, having its lateral leaflets 

 divided into several others. 



Pinnate or Winged, when several leaflets proceed laterally 

 from a common stalk. Of this there are several varieties. 



Pinnate with an odd terminal leaflet. (Fig. 77, 80, 84.) 



Pinnate with a tendril (Fig. 78.), when a tendril or thread- 

 like body terminates the stalk. 



Abruptly Pinnate (Fig. 79.), without a terminal leaflet or 

 tendril. 



Alternately Pinnate (Fig. 80.), when the leaflets are al- 

 ternate. 



Oppositely Pinnate (Fig. 77, 78, 79.), when the leaflets are 

 opposite. 



