2O 



AGRICULTURE 



and pistils borne on the same plant, but not in the same 

 flower, are the castor bean, the oak, and the pecan. 



Pistils and stamens are sometimes on different plants. 

 This is the case with hemp, willows, and poplars. 



EXERCISE. Tie paper bags or pieces of tough paper snugly around 

 the unopened buds of any kind of plants that may be blooming when 

 you study this lesson. In a week notice whether the pistil is growing 

 and seeds are forming If so, these plants do not need visits from 

 insects, but are self-pollinated. Notice what flowers are being visited 

 by insects and especially by honey bees. Notice the kind of insect. 

 Watch them to learn whether they brush off any pollen of another 

 flower against the pistil. 



NOTE TO THE TEACHER. If a catalogue of some nursery company 

 can be had, examine its list of strawberries and by questioning the 

 pupils learn which of these varieties are grown near the school. Have 

 they fruited well? If not, are they marked in the catalogue as pistil- 

 late varieties? Blooms of pumpkins or of any kind of melon make a 

 good subject for examination and discussion in this lesson. The 

 .questioning on all lessons should be more to encourage observation and 

 understanding than to measure memory work. 



Fio. 20. SECTION LENGTHWISE 

 THROUGH A PISTILLATE SQUASH 

 BLOSSOM 

 o, ovule case ; c, base of corolla. 



