Species Petalophyllum

^ cite error: named reference crandall01 invoked never defined (see page).
^ stotler, r.e. , crandall-stotler, b.j. bryophytes: mosses, liverworts, , hornworts . bryophyte research. southern illinois university carbondale. retrieved 4 september 2017. 
^ evans, a.w. 1919. notes on north american hepaticae - viii. bryologist, vol. 22, p. 54-73.
^ ford, c.h. , crandall-stotler, b.j. 2002. contributions toward monograph of petalophyllum (marchantiophyta). novon, vol. 12, p. 334-337.
^ glenny, d., fife, a.j., brownsey, p.j., renner, m.a., braggins, j.e., beever, j.e. , hitchmough, r. 2011. threatened , uncommon bryophytes of new zealand (2010 revision). new zealand journal of botany, vol. 49, no. 2, p. 305-327.
^ de lange, p.j., glenny, d., braggins, j.e., renner, m., von konrat, m., engel, j.j., reeb, c. , rolfe, j.r. 2015. conservation status of new zealand hornworts , liverworts, 2014. publishing team, department of conservation.
^ mehra, p.n. , vashisht, b.r. 1950. embryology of petalophyllum indicum kash. , new suggestion of evolution of thalloid habit foliose forms. bryologist, vol. 53, no. 2, p. 90-114.
^ rumsey, f.j., vogel, j.c. , russell, s.j. 2001. study of genetic variation in threatened hepatic petalophyllum ralfsii (wils.) nees , gottsche (fossombroniaceae). conservation genetics, vol. 2, no. 3, p. 271-277.
^ 1395 petalwort, petaolphyllum ralfsii . joint nature conservation committee, u.k. retrieved 4 september 2017.