162 



ORGANOGRAPHY. 



as in Geranium dlssectum; or if these divisions are very nar- 

 row and thread-like, as in tlie submerged leaves of the Water 

 Crowfoot {fi(j. 312), it is said to be filiformly dissected. When 



Fig. 312. 



Fig. 312. Filiformly dissected leaf of the Water Crowfoot (.Ranunculus aquatilis^. 



the lateral lobes of a palmate leaf are themselves divided into 

 two or more divisions {fig. 313), the leaf is said toha pedate, from 



the resemblance it is supposed 

 to bear to a bird's foot, as in 



Fig. 313. 



Stinking Hellebore. This kind 

 of leaf is by some botanists de- 

 scribed as compound, to Avhicli 

 division, in many cases at least, 

 it properly belongs. It may be 

 considered as a transitional form 

 between simple and compound 

 leaves. Besides the above mo- 

 difications of palmately veined 

 leaves, others also occur, in 

 consequence of the lobes be- 

 either in a pinnately veined, or 

 palmately veined manner, and terms are used accordingly, the 

 application of which will be at once evident from what we have 

 above stated. 



3. Apex. — This differs very considerably in its appearance in 

 different leaves. Thus the apex is obtuse or blunt, when it is 

 rounded or forms the segment of a circle {figs. 321, 323, and 

 324), as in the Primrose and Snowdrop; it is termed retuse \\'\\q.\\ 

 it is obtuse, with a broad shallow notch in the middle {fig. 327), 

 as in tlieKcd Whortleberry ( Vaccininm Vitis-idcca); when under 

 the same circumstances the notch is sharp, or nearly triangular, 



Fig. 313. Pedate leaf. 



coming themselves divided. 



