Their ancestors once dominated the coal swamps of the Carboniferous Period, growing into massive trees that could reach upwards of 160 feet (50 m) into the canopy. Today, the quillworts (Isoetes spp.) are all that remains of this lineage. Though cosmopolitan in their distribution, quillworts can be hard to find unless you know where to look. Luckily, there are people like PhD student David Wickell who have placed them at the center of their scientific focus. David is hard at work helping to uncover the mysteries of these wonderfully strange lycophytes. As you will hear, this work includes everything from CAM photosynthesis to the role of hybridization in speciation. This episode was produced in part by Kristina, Christine, Silas, Michael, Aristia, Felicidad, Lauren, Danielle, Allie, Jeffrey, Amanda, Tommy, Marcel, C Leigh, Karma, Shelby, Christopher, Alvin, Arek, Chellie, Dani, Paul, Dani, Tara, Elly, Colleen, Natalie, Nathan, Ario, Laura, Cari, Margaret, Mary, Connor, Nathan, Jan, Jerome, Brian, Azomonas, Ellie, University Greens, Joseph, Melody, Patricia, Matthew, Garrett, John, Ashley, Cathrine, Melvin, OrangeJulian, Porter, Jules, Griff, Joan, Megan, Marabeth, Les, Ali, Southside Plants, Keiko, Robert, Bryce, Wilma, Amanda, Helen, Mikey, Michelle, German, Joerg, Cathy, Tate, Steve, Kae, Carole, Mr. Keith Santner, Lynn, Aaron, Sara, Kenned, Brett, Jocelyn, Ethan, Sheryl, Runaway Goldfish, Ryan, Chris, Alana, Rachel, Joanna, Lori, Paul, Griff, Matthew, Bobby, Vaibhav, Steven, Joseph, Brandon, Liam, Hall, Jared, Brandon, Christina, Carly, Kazys, Stephen, Katherine, Mohsin Kazmi Takes Pictures, Manny, doeg, Daniel, Tim, Philip, Tim, Lisa, Brodie, Bendix, Irene, holly, Sara, and Margie.

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Music by Moneycat

There is no denying that roots are one of the most important organs on a plant. However, unless its an epiphyte, root activity takes place underground, largely out of site and out of mind. This has not stopped my guest today from trying to understand the origin and evolution of these amazing structures. Joining us from Magdalen College in the UK is plant evolutionary biologist Dr. Sandy Hetherington whose work spans hundreds of millions of years of root history. Join us as we explore the early days of root evolution and learn how things like fungal symbionts and a lack of organic matter set the course for root evolution. As you will hear, this work also relies heavily on museum and herbarium collections, underscoring the importance of preserving these important data goldmines. This episode was produced in part by Kevin, Oliver, John, Johansson, Christina, Jared, Hannah, Katy Pye, Brandon, Gwen, Carly, Stephen, Botanical Tours, Moonwort Studios, Lisa, Liba, Lucas, Mohsin Kazmi Takes Pictures, doeg, Clifton, Stephanie, Rachelle, Benjamin, Eli, Rachael, Anthony, Plant By Design, Philip, Brent, Ron, Tim, Homestead Brooklyn, Brodie, Kevin, Sophia, Brian, Mark, Rens, Bendix, Irene, Holly, Caitlin, Manuel, Jennifer, Sara, and Margie.

Follow Dr. Hetherington on Twitter: @Sandy_Heth

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