common toadskin lichen - lasallia papulosa

soil rock wildlife invertebrate geology leaf tree flower nature plant insect animal trunk autumn pattern wood common toadskin lichen lasallia papulosa close growing fairfield connecticut medical life dull identification coloration field research spore body fruiting outdoors park state preservation conservation environmental ecology abundant summer spring science purposes medicinal edible pond squantz biodiversity mutualism relationship symbiotic cyanobacteria algae umbilicariaceae fungi skin toad