1. Moss flora of Central America. Part 1. Sphagnaceae–Calymperaceae;Allen BH.;Monographs in Systematic Botany from the Missouri Botanical Garden,1994
2. Moss flora of Central America. Part 2. Encalyptaceae–Orthotrichaceae;Allen BH.;Monographs in Systematic Botany from the Missouri Botanical Garden,2002
3. Maine mosses: Sphagnaceae–Timmiaceae;Allen BH.;Memoirs of the New York Botanical Garden,2005
4. Moss flora of Central America. Part 3. Anomodontaceae–Symphyodontaceae;Allen BH.;Monographs in Systematic Botany from the Missouri Botanical Garden,2010
5. Maine mosses: Drummondiaceae–Polytrichaceae;Allen BH.;Memoirs of the New York Botanical Garden,2014