On a nice winter day, I took a stroll and found my garden covered with weeds. This garden was bare soil last fall when I put it to bed. Not a weed in sight. Now it’s a blanket of bright green flourishing weeds! How can that be? Those are. For 150 years, scientists believed lichen were defined by a symbiotic relationship between a fungus and algae. Lichen: Lichen, any of…