36 



OROANOGJRAPHY. 



leaves. The pinnate leaves have the leaflets or pinnce 

 arranged on each side of the rachis. If the leaflets are in 



pairs throughout, the leaf is said to be abruptly-pinnate 

 {Fig. 74) ; if a single leaflet terminates the rachis, the leaf 

 is said to be odd-pinnate (Fig. 73). Palmate (some- 

 times called- digitate) leaves have the leaflets borne on 

 the extreme tip of the leaf-stalk (Fig. 75). 



42. The leaflets themselves may be divided, which is 

 expressed by the terms bi-pinnate (twice pinnate, Fig. 

 76), or thrice pinnate. When the leaf is several times 

 compound, it is called de-compound. 

 Of numerous other forms not yet men- 

 tioned, the following 

 are conspicuous. Per- 

 foliate (Lat. per, 

 through; /o/mm, leaf), 

 in which the stem ap- 

 pears to pass through 

 the leaf near its base 



Fig. 74. An Abraptly-piniiate leaf. Fig. 7.i. A Palmate (or Digitate) leaf. Fig. 

 76. A Bi-piiinate leaf. Fig, 77. A Perforate leaf. 



