XXX. DUCKWEED 



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

 while waiting to use a subject wliich, 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 j)lant 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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