116 STRUCTURAL BOTANY. [98,99. 



broader in proportion than the pinnate, having the 

 breadth about equal to the length. Such a leaf may 

 be rarely broadly ovate, or broadly cordate, terms which 

 require no further explanation. Or it may be Reni- 

 form, kidney-shaped, having a flowing outline broader 

 than long, concave at base ; or Peltate, shield-form, the 

 petiole not inserted at the margin, but in the midst 



$46 



Feather-veined leaves approaching the compound.-^, Nigella (pinnatisect). 344, Cheledonium majus. 

 345, Thistle (Cirsium lanceolatum). 346, Dandelion (runcinate-lyrate). 



of the lower surface of the blade. This singular form 

 evidently results from the blending of the base lobes 

 of a deeply cordate leaf, as seen in Hydrocotyle. It 

 may be orbicular, oval, etc. 



296. The following result from deficiency of tissue, 

 causing deep divisions between the veins. Leaves thus 

 dissected are said to be palmately-lobed when either 

 the segments or the sinuses are somewhat rounded and 

 continuous. The number of lobes is denoted by such 

 terms as Trilobate, trilobate, five-lobed, etc. Leaves are 



