Lobed and Compound Leaves. 57 



(3) compound leaves (d in Fig. 46 and Fig. 47). Classify 

 the first set as you have done before. Classify the second, 

 putting those with leaflets all at the end of the petiole (see 

 Fig. 47, a) separate from those like d in Fig. 46. 



Have you observed anything which will enable you to 

 answer these questions ? Which edge of an elm leaf is 

 nearest the twig on which it grows ? Which are moved 

 most by a breeze, elm leaves or poplar leaves? Why? 

 Which have stipules ? 

 Stipules which soon fall 

 are caducous. Describe 

 the lobed leaves. Which 

 have acute or acuminate 

 lobes? Rounded or ob- 

 tuse lobes ? Observe the 

 spaces between lobes 

 (sinuses). Which are 

 rounded? Which are 

 acute ? Notice the veins 

 or ribs which run from 



, 1 1_ /- 1 -L j Fig- 47. a. Palmately 3-foliolate leaf of clover 



me base Ot SOme lObed with lacerate adnate stipules, b- Pinnately 3-folio- 

 late leaf of bur-clover with free lanceolate stipules. 



leaves through the lobes. 



(Fig. 46 c and e.) These leaves are palmately lobed. 

 Those, like a and b in the figure, are pinnately lobed. When 

 in any leaf there are three or more large veins or ribs, 

 which starting from the base of the blade separate widely, 

 we say it is palmately veined. If the large veins are 

 branches of a midrib the leaf is pinnately veined. Deeply 



