Photosynthesis (Net CO2 Exchange Rate) References
Evernia mesomorpha Nyl. [Ring Lichen]
Huebert, D.B., l'Hirondelle, S.J. and Addison, P.A. 1985. The effects of sulphur dioxide on net CO2 assimilation in the lichen Evernia mesomorpha Nyl. New Phytologist 100: 643-651.