STRUCTURE OF THE PLANT 27 



powder, brown or yellow in colour. This powder is 

 composed of very minute bodies, visible only through a 

 microscope, and so small in size that a row of them one 

 inch in length would contain something like one thou- 



FlG. 14. 



sand of them. Every such grain of powder can produce 

 a new plant. Here is the so-called Lycopodium powder, 

 yellow, soft to the touch, which falls from the cones of 

 the club-moss (fig. 14), and is used by chemists for 

 powdering pills. I throw a handful of this powder into 

 the flame of a candle and the cloud of dust is illuminated 



