Petalophyllum ralfsii

Petalophyllum ralfsii
Scientific classification
Kingdom:	Plantae
Division:	Marchantiophyta
Class:	Jungermanniopsida
Order:	Fossombroniales
Family:	Petalophyllaceae
Genus:	Petalophyllum
Species:	P. ralfsii
Binomial name
	Petalophyllum ralfsii; (Wilson) Nees & Gottsche ex Lehmann, 1844

Petalophyllum ralfsii, the petalwort,^[1] is a liverwort of the order Fossombroniales.^[2] It is a small green bryophyte that occurs in the Mediterranean region as far east as Turkey, and along the Atlantic coast of Europe as far as northwest Scotland.^[3] It grows primarily on moist sand dunes.^[4]

The plants are small, typically less than 15 mm long by 10 mm wide (0.6 in by 0.4 in), and thallose; that is, the plant is not differentiated into root, stem, and leaf. The thallus consists of a midrib flanked by two wings that bear erect, leaf-like lamellae on their dorsal surface.^[4]^[5]

References

↑ Edwards, Sean R. (2012). English Names for British Bryophytes. British Bryological Society Special Volume. 5 (4 ed.). Wootton, Northampton: British Bryological Society. ISBN 978-0-9561310-2-7. ISSN 0268-8034.
↑ Crandall-Stotler, B.J., Stotler, R.E. and Long, D.G. 2009. Phylogeny and classification of the Marchantiophyta. Edinburgh Journal of Botany, vo. 66, no. 1, p. 155-198.
↑ Rumsey, F.J., Vogel, J.C. and Russell, S.J. 2001. A study of genetic variation in the threatened hepatic Petalophyllum ralfsii (Wils.) Nees and Gottsche (Fossombroniaceae). Conservation Genetics, vol. 2, no. 3, p. 271-277.
1 2 "1395 Petalwort, "Petaolphyllum ralfsii"". Joint Nature Conservation Committee, U.K. Retrieved 4 September 2017.
↑ Crandall-Stotler, B.J. 2017. "Bryophyte Flora of North America, Provisional Publication, Petalophyllaceae". Missouri Botanical Garden. Retrieved 4 September 2017.

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[BBS-1] Edwards, Sean R. (2012). English Names for British Bryophytes. British Bryological Society Special Volume. 5 (4 ed.). Wootton, Northampton: British Bryological Society. ISBN 978-0-9561310-2-7. ISSN 0268-8034.

[Crandall02-2] Crandall-Stotler, B.J., Stotler, R.E. and Long, D.G. 2009. Phylogeny and classification of the Marchantiophyta. Edinburgh Journal of Botany, vo. 66, no. 1, p. 155-198.

[3] Rumsey, F.J., Vogel, J.C. and Russell, S.J. 2001. A study of genetic variation in the threatened hepatic Petalophyllum ralfsii (Wils.) Nees and Gottsche (Fossombroniaceae). Conservation Genetics, vol. 2, no. 3, p. 271-277.

[JNCC-4] 1 2 "1395 Petalwort, "Petaolphyllum ralfsii"". Joint Nature Conservation Committee, U.K. Retrieved 4 September 2017.

[Crandall-5] Crandall-Stotler, B.J. 2017. "Bryophyte Flora of North America, Provisional Publication, Petalophyllaceae". Missouri Botanical Garden. Retrieved 4 September 2017.