Accepted By and Published In:
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Cronquist, A. J., A. L. Takhtajan & W. M. Zimmermann. 1966. On the higher taxa of Embryobionta. Taxon 15(4): 129–134.
Accepted By:
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Doweld, A. B. 2001. Prosyllab. Tracheophyt. 110 + LXXX pp. Geos, Moscow.
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Stotler, R. E. & B. J. Crandall-Stotler. 1977. A checklist of the liverworts and hornworts of North America. Bryologist 80: 405–428.
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