30 



OBJECT LESSONS IN BOTANY. 



88. Every one knows that the number of Icallets in tlie 

 Clover is three; also in the Bean, and in this figure (62) of 

 the Desmodium leaf. Such leaves are called ternate. But 

 here the pupil will notice another important distinction. In 

 this Desmodium leaf, the odd leaflet is stalked, and is said 

 to be ^:>?727i(2i5(?Zy ternate ; in Clover, the 

 odd leaflet is nearly sessile, like the 

 this \'$= ixdmately ternate. 



Fig. 65. Poison Hemlock. 



39. Fig. 64 represents a li-jjmnate (that is, twice pinnate) 

 leaf of Honey Locust. The simple leaflets seem to have 

 eacli become itself a pinnate leaf. And still more compound 

 is this Poison Hemlock leaf, being tri-jpinnate^ or thrice pin- 

 nate (Fig. 65). In the same manner, we hav<3 M-ternate and 

 tri-teimate. 



38. How many leaflets in a ternate leaf? Difference between tliQ pin- 

 aately and tlie palmately ternate ? 



39. Can you define a bi-pinnate leaf? Tri-pinnate ? Wliat is abi-ternata 

 teaf ? A tri-ternate ? 



