30 



ELEMENTARY BOTANY. 



is an even line without any notches or teeth ; seirrate (Lat. 

 scrra, saw), with teeth hke a saw projecting towards the apex 

 (Fig. 35); dentate (Lat. dens, tooth), with teeth pointing out- 



M^ 



Fig. 35. 



ward instead of forward (Fig. 36) ; crenate (Lat. crena, scal- 

 lop), scalloped (Fig. 37) ; undiilate (Lat. undula, wave), wavy 

 (Fig. 38) ; incised, when the edge is cut and jagged (Fig. 39). 

 When leaves are:deeply cut, the divisions are called lobes. If 

 the incisions extend more than half-way from the margin to 



Leaflet 



Fig. 40. 



Fig. 41. 



the midrib, the leaf is said to be cleft; the number of 

 segments is indicated by the terms bifid (two-cleft), trifld 

 (three-cleft), multifid (many-cleft), etc. If the incisions ex- 

 tend almost to the midrib, the leaf is. said to be parted; if 



