XXX. DUCKWEED 



Material. Duckweed floating in a dish of water. Give this lesson 

 while waiting to use a subject which, like the lesson on maple buds, must 

 be given in the course of the few days during which the specimens are in 

 the proper stage. 



Observation. How large is a duckweed plant? 

 Has it a stem? How many leaves has it? How 

 large is one of the leaves ? What is its shape ? 

 What is its color ? How are the leaves joined 

 together ? 



How many roots has a duckweed plant? How 

 large is a root ? What is its shape ? What is its 

 color ? Are the roots single or branched ? To 

 what part of the plant are they fastened ? Are their 

 lower ends fastened to anything ? 



Drawing and Composition. Draw a picture and 

 write a description of a duckweed plant. 



SUPPLEMENTARY WORK 



How a Duckweed Grows. A duckweed plant consists of 

 three or four small leaves which float on the water, and a few 

 slender roots which hang loose in the water. The whole plant 

 is smaller than a fingernail, but it is often so plentiful as to 

 form a green covering on the water. Why do you not find it 

 in the middle of an open pond ? 



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