database: The PLANTS Database, 31-Dec-1997; National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
database: NODC Taxonomic Code;
database: The PLANTS Database; National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
database: The PLANTS Database; National Plant Data Center, NRCS, USDA. Baton Rouge, LA 70874-4490 USA. http://plants.usda.gov
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Crandall-Stotler, B., R. E. Stotler, and D. G. Long 2009-03-01. Edinburgh Journal of Botany, vol. 66, no. 1. . . 155-198. . doi:10.1017/S0960428609005393.
Crandall-Stotler, Barbara, and Raymond E. Stotler / Shaw, A. Jonathan, and Bernard Goffinet, eds. 2000-01-01. Bryophyte Biology. Cambridge University Press. Cambridge, United Kingdom. 21-70. 0 521 660971. .