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| MaltaWildPlants.com by Stephen Mifsud |
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Wolffia arrhiza (Rootless Duckweed) |
Wolffia arrhiza (ARACEAE.)
Images for this profile are taken from the Maltese Islands at or after year 2000. |
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| Nomenclature and Basic Information |
Species name : |
Wolffia arrhiza (L.) Wimmer
Published in (L.) Horkel ex Wimmer, Fl. Schles. ed. 3, 140 (1857) | Synonyms : |
Basionym or principal synonym:
No Main Synonyms
Full list of synonyms :
[ Euro+Med ]
[ PlantList ]
[ IPNI ]
[ Catalogue of Life ]
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Plant Family : | Araceae The Arum Family 8 Araceae species recorded from Malta.
Juss. | English name(s) : | Rootless Duckweed | Maltese name(s) : | Maltese name not known | Status for Malta : | Casual Alien | Frequency : | Very Common Common Frequent
Scarce Rare
Very Rare Extinct
| Growth form : |
Raunkiaer lifeform [info]: HYDROPHYTE (Living in/on water)
Germination [info]: Monocotyledon | Legal Protection [link]: | Not Protected by Law (LN200/2011 or LN311/2006) | Red List (1989) : | Not listed in the Red Data Book of the Maltese Islands | Flowering Time : | Mar-May | Colour of Flowers: | Inc |
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| Species Description and Distribution |
Habitat in Europe: |
Data will be available in the next update of this website. |
Preferred habitat in Malta: |
Data will be available in the next update of this website. |
Botanical Description: |
Fronds 0•5-1 mm, ellipsoid or subglobose, light green. |
Chromosome number: |
2n=50 |
Distributional range: |
From England and Lithuania southwards to W.C. Portugal, Sicilia and Bulgaria. |
Distributional map in Europe
and the Mediterranean region (2018):
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Occurrences in Europe.
(from Flora Europaea pre year 1993): |
Austria and Liechtenstein, Belgium, Britain (excl. Northern Ireland and Channel islands), Bulgaria, Corse, Czeck Republic and Slovakia, France (incl. Monaco and Channel Islands but excluding Corse), Germany, the Netherlands, Spain (incl. Andorra but excl. the Balaerics), Hungary, Italy (excl. Sicily and Sardignia), ex-Jugoslavia, Portugal, Poland, Romania, Russia and former USSR, B C W Sicily and/or Malta |
Occurrences in Europe and the Mediterranean region.
(Euro+Med Checklist, 2017) -
Country codes |
Ab(A) Ag Al †Au(A) Be(B) Br Bu By Ca(T) Co Ct Ga(F) Ge He Ho Hs(S) Hu IJ It Lu Ma Po Rf(C E S) ?Rf(K) Rm Si(S) Sl Sr Uk(U) [Cs Lt Rf(C) Si(M) Sk] |
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| Submit further info on this species |
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Use this form to submit more information on this species or report mistakes in this webpage. If information supplied is taken from a book, journal or website, please provide the corresponding reference or website address. Your email address is only for internal communication. Please report only Maltese locations for plants that indicated as rare or very rare (refer to the Nomenclature section). Please do report mistakes, broken links, technical errors, silly typing / grammar errors, misidentifications or taxonomical updates; this will help to improve the website's accuracy. Thanks you! Fill any of the three sections (A/B/C) below and kindly submit the form. * = required fields.
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