22 



PLANT MORPHOLOGY 



Fig. 12. Group of common diatoms. A, Triceratium; B, Aitlacodiscits; C, Isthmia; D, 

 Sitrirella, E, Navicula; F, Amphipleura; G, Pleurosigma. {Adapted from a Turtox classroom 

 chart.) 



