Wolffia arrhiza

Wolffia arrhiza
Conservation status
	; Least Concern (IUCN 3.1)
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Alismatales
Family:	Araceae
Genus:	Wolffia
Species:	W. arrhiza
Binomial name
	Wolffia arrhiza; (L.) Horkel ex Wimm.
Synonyms
	Bruniera vivipara Franch. ; Horkelia arrhiza (L.) Druce ; Lemna arrhiza L. ; Lemna microscopica Schur ; Lenticula arrhiza (L.) Lam. ; Wolffia delilii Miq. ; Wolffia michelii Schleid. ;

Wolffia arrhiza is a species of flowering plant known by the common names spotless watermeal and rootless duckweed, belonging to the Araceae, a family rich in water-loving species, such as Arum and Pistia. It is the smallest vascular plant on Earth.^[2]^[3]^[4] It is native to Europe, Africa, and parts of Asia, and it is present in other parts of the world as a naturalized species.^[5]^[6]

^ Lansdown, R.V. (2019). "Wolffia arrhiza". IUCN Red List of Threatened Species. 2019: e.T164241A120209232. doi:10.2305/IUCN.UK.2019-2.RLTS.T164241A120209232.en. Retrieved 30 April 2023.
^ Pietryczuk, A., et al. (2009). The effect of sodium amidotrizoate on the growth and metabolism of Wolffia arrhiza (L.) Wimm. Polish Journal of Environmental Studies 18:5 885-91.
^ Pan, S. and S. S. C. Chen. (1979). The morphology of Wolffia arrhiza: A scanning electron microscopic study. Bot Bull Academia Sinica 20 89-95.
^ Czerpak, R., et al. (2004). Biochemical activity of auxins in dependence of their structures in Wolffia arrhiza (L.) Wimm. Archived 2011-09-11 at the Wayback Machine Acta Societatis Botanicorum Poloniae 73:4 269-75.
^ "Wolffia arrhiza". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 2 January 2018.
^ "Wolffia arrhiza in Flora of North America @ efloras.org". efloras.org.

[1] Lansdown, R.V. (2019). "Wolffia arrhiza". IUCN Red List of Threatened Species. 2019: e.T164241A120209232. doi:10.2305/IUCN.UK.2019-2.RLTS.T164241A120209232.en. Retrieved 30 April 2023.

[piet-2] Pietryczuk, A., et al. (2009). The effect of sodium amidotrizoate on the growth and metabolism of Wolffia arrhiza (L.) Wimm. Polish Journal of Environmental Studies 18:5 885-91.

[pan-3] Pan, S. and S. S. C. Chen. (1979). The morphology of Wolffia arrhiza: A scanning electron microscopic study. Bot Bull Academia Sinica 20 89-95.

[czer-4] Czerpak, R., et al. (2004). Biochemical activity of auxins in dependence of their structures in Wolffia arrhiza (L.) Wimm. Archived 2011-09-11 at the Wayback Machine Acta Societatis Botanicorum Poloniae 73:4 269-75.

[5] "Wolffia arrhiza". Germplasm Resources Information Network. Agricultural Research Service, United States Department of Agriculture. Retrieved 2 January 2018.

[6] "Wolffia arrhiza in Flora of North America @ efloras.org". efloras.org.

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Wolffia arrhiza


Conservation status
Least Concern (IUCN 3.1)^[1]
Scientific classification
Kingdom:	Plantae
Clade:	Tracheophytes
Clade:	Angiosperms
Clade:	Monocots
Order:	Alismatales
Family:	Araceae
Genus:	Wolffia
Species:	W. arrhiza
Binomial name
*Wolffia arrhiza* (L.) Horkel ex Wimm.
Synonyms
Bruniera vivipara Franch. Horkelia arrhiza (L.) Druce Lemna arrhiza L. Lemna microscopica Schur Lenticula arrhiza (L.) Lam. Wolffia delilii Miq. Wolffia michelii Schleid.