Casey Williams is an botanist and plant ecologist specializing in aquatic plants - both plants that grow completely submerged and which can emerge above the water surface. In this episode, we discuss :

-the stresses facing plants that grow underwater, 
-being limited by CO2 availability instead of water availability, 
-the endangered Texas Wild Rice, 
-how limestone geology influences aquatic plant growth by making CO2 more abundant, 
-utilizing aquatic plants and the fungi that grow on them for bioremediation and treating sewage at the local shitplant 
-how some aquatic plants have adapted to a paucity of dissolved carbon dioxide by supplementing with bicarbonate,
-aquatic plants in deserts, and
-how one plant in particular has utilized an evolutionary strategy more frequently employed by desert plants  (CAM) as a way to cope with fluctuations in CO2 availability. 

Books referenced which can be downloaded off libgen.is : 

Wetland Plants by Cronk
Aquatic Photosynthesis by Falkowski