TENDEIL-BEABEES. 



71 



ture represented in the following diagram. This leaf bore nine 

 leaflets; the lower ones are mnch subdivided. The terminal 

 portion of the petiole, about 1^ inch in length (above the leaflet 

 if) ), is thinner and more elongated than the lower part, and may 



Fig. 8. 



Coj^ydalis clavictdata. 

 Leaf-tendril, of natural size. 



be considered as the tendril. The leaflets borne by this part are 

 greatly reduced in size, being, on an average, about the tenth of an 

 inch in length and very narrow ; one small leaflet measured one- 

 twelfth of an inch in length and one- seventy-fifth in breadth, so that 



almost microscopically 



AU 



branching nerves, and terminate In little spines like the fully de- 



veloped leaflets. 



gradation can be traced, until 



branchlets (as a and d in the figure) which show no vestige oi a 



lamina or blade. Occasionally all the terminal branchlets of the 



petiole are in this latter condition, and we then have a true tendril. 



The several terminal branches of the petiole bearing the much- 



