30 OBJECT LESSONS IN BOTANY. 
38. Every one knows that the number of leaflets in the 
Clover is three; also in the Bean, and in this figure (62) of 
the Desmodium leaf. Such leaves are called ¢ernate. But 
here the pupil will notice another important distinction. In 
this Desmodium leaf, the odd leaflet is stalked, and is said 
to be pinnately ternate; in Clover, the 
odd leaflet is nearly sessile, like the 
other leaflets; this is palmately ternate. 
Fig. 64. Honey Locust. Fig. 65. Poisou Hemlock. 
39. Fig. 64 represents a bi-pinnate (that is, twice pinnate) 
leaf of Honey Locust. The simple leaflets seem to have 
each become itself a pinnate leaf. And still more compound 
is this Poison Hemlock leaf, being tz-pinnate, or thrice pin- 
nate (Fig. 65). In the same manner, we have b7-ternate and 
tri-ternate. 
38. How many leaflets in a ternate leaf? Difference between the pin- 
nately and the palmately ternate ? 
89. Can you define a bi-pinnate leaf? Tri-pinnate? What is a bi-ternate 
feaf? A tri-ternate? 
