240 



THE TEACHING BOTANIST 



ever, that while these diagrams are extremely useful servants 

 they are bad masters. In my own experience I have found 



FlG. 26. Diagram of Hyacinth flower. The vertical lines show the perianth 



tube ; other shading as in Fig. 25. 



nothing to equal them for compelling clear ideas on the 

 part of the student. 



XV. The Morphology and Ecology of the Flower 



57. What is the exact structure and morphological 



composition of the Snowdrop flower ? 

 Express in the horizontal and vertical diagrams. 



