110 Elementary Work in Botany. 



Compare your drawings with those in Fig. 84. Note the 

 arrangement of the woody fibers. Where are they most 

 abundant ? Which most often have long slender leaves, 

 exogens or endogens. 



All grasses, lilies, and palms are endogens. Cocoanuts, 

 dates, pineapples, bananas, rice, corn, and all the so-called 

 grains, except buckwheat, are fruits of endogens. 



Is the calla an exogen or an endogen ? If its ancestors 

 had petals, how many were there ?* 



* Plants may be studied in this way as long as the teacher thinks best. Usually 

 small plants like oxalis, violets, etc., should be chosen. Two or three exercises 

 may well be devoted to one plant. 



There should be review lessons based upon the note-books of the class. This 

 important work is left in the hands of the teacher. 



