My research has dealt with monographic, floristic, and morphological/anatomical studies of lichens including growth of the symbionts. I have had extensive collecting experience in many parts of the world. Recent research is directed toward a monographic study of the lichen genus Caloplaca in North America and using lichens as indicators of air quality.
Wetmore, C.M. (1994) The lichen genus Caloplaca in North and Central America with brown or black apothecia. Mycologia 86:813-838.
Wetmore, C.M. (1996) The Caloplaca sideritis Group in North and Central America. The Bryologist 99: 292-314.
Wetmore, C. M. 1997. The typification of Caloplaca chlorina. Bryologist 100: 170.
Bennett, J. P. & C. M. Wetmore. 1997. Chemical element concentrations in four lichens on a transect entering Voyageurs National Park. Envir. Exper. Bot. 37: 173-185.
Karnefelt, E. I. & C. M. Wetmore. 1998. The lobate and subfruticose species of Caloplaca in North and Central America. Bryologist 101: 230-255.
Wetmore, C. M. 1999. Four new species of Caloplaca from Mexico. Bryologist 102: 99-103.
Bennett, J. P. & C. M. Wetmore. 1999. Changes in element content of selected lichens over 11 years in northern Minnesota, USA. Envir. Exper. Bot. 41: 75-82.
Bennett, J.P. and C. Wetmore. 1999. Covariance of lichen and vascular plant floras. Rhodora 101:277-297.
Bennett, J.P. and C. Wetmore. 1999. Geothermal chemical elements in lichens of Yellowstone National Park, USA. Env. Exp. Bot. 42:191-200.
Wetmore, C. and E. K¹rnafelt. 1999. What is Caloplaca cinnaborina? Bryologist. 104: 683-691.
Sliwa, L. and C. Wetmore. 2000. Variation in the Lecanora varia group in North America. Bryologist 103:475-492.
Wetmore, C. 2000. Lichenes Exsiccati Fasc. 4-5. (Set of 50 lichens distributed world-wide).
Bennett, J. and C. Wetmore. 2001. 16-year trends in elements of lichens at Theodore Roosevelt National Park, North Dakota. Sci. of Total Envir. 263:231-241.
Wetmore, C. 2001. The Caloplaca citrina group in North and Central America. Bryologist 104: 1-11.
Hsueh, I., C. Wetmore, & M. Lai 2001. Neglected lichen family Caliciaceae new to Taiwan. Mycotaxon 79: 215-216.
Wetmore, C. 2003. The Caloplaca squamosa group in North and Central America. Bryologist 106: 147-156.