POLYGONATUM, 



GiGANTEUM Solomofi's Seal 



BiFLORUM Solomon's Seal 



POLYGALA, 



BREviFoiyiA Milkivorts 



SANGUiNEA Milkworts 



POLEMONIUM, 



REPTANS Greek Valerian 



PONTEDERIA, 



coRDATA Pickerel Weed 



PODOPHYLLUM, 



peltatum May Apple 



POTOMOGETON, 



GRAMiNDUS Poud Weed 



Those who desire to make further discoveries 

 can with a microscope take up the Algae, a 

 large group of cosmopoHtan plants. In the 

 order of Diatoms, many are found attached 

 to these pond weeds. They vary greatly, 

 showing plant forms that are very beautiful. 

 There are many genera, and millions of species, 

 growing and moving everywhere, but how, is 

 one of nature's secrets. 



POTENTILLA, 



Canadensis Pive Fingers 



PSORALEA, 



oNOHRYCHis Psoraka 



PTEROSPORA, 



Andromedea Pine Drops 



74 



