This past summer I collected Ipomoea pes-caprae plants. They form an interesting relationship with a fungus called Periglandula that secretes ergot alkaloids which prevent herbivory on these plants. You can propagate them clonally if you cut them, let them soak in water until roots form, and then plant. They're growing!. You see those white fuzzies on the leaf in the picture? That is most likely Periglandula tissue! (maybe... I still need to confirm with PCR and gels)
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