Lemna trisulca
{{short description|Species of flowering plant in the family Araceae}}
{{Speciesbox
|image = LemnaTrisulca.jpg
|status = LC
|status_system = IUCN3.1
|status_ref =
|genus = Lemna
|species = trisulca
|authority = L.
}}
Lemna trisulca L. (syn. Staurogeton trisulcus (L.) Schur; star duckweed;{{PLANTS|id=LETR|taxon=Lemna trisulca|accessdate=2016-01-24}} ivy-leaved duckweed{{BSBI 2007 |accessdate=2014-10-17 }}) is a species of aquatic plants in the arum family Araceae. It has a subcosmopolitan distribution. Unlike other duckweeds, it has submerged rather than floating fronds (up to 12-14m below the surface{{Cite journal |last1=Pip |first1=Eva |last2=Simmons |first2=Kent |date=1986 |title=Aquatic angiosperms at unusual depths in Shoal Lake, Manitoba-Ontario |journal=The Canadian Field-Naturalist |volume=100 |issue=3 |pages=354–358 |doi=10.5962/p.355648 |issn=0008-3550|doi-access=free |hdl=10680/1293 |hdl-access=free }}), except when flowering or fruiting. Also unlike other duckweeds, a large number of fronds remain attached to each other at a time.
Description
The fronds usually grow submerged and are oblong-lanceolate in shape and are up to 14 mm long. They are blunt at the end and taper to a tail-like stalk at the other.Parnell, J. and Curtis, T. 2012. Webb's An Irish Flora. Cork University Press. {{ISBN|978-185918-4783}}
The flowering fronds are smaller than the vegetative fronds and somewhat curl up from under the water to the surface to present the flowers {{cite web |title=Article in Limnologica April 2021 |url=https://www.researchgate.net/publication/350780871}} (to a casual look this may cause the flowering fronds to resemble reddened duckweeds more of the L. minor format with white flower spots, with obvious greener L. trisulca directly beneath); [http://www.plantillustrations.org/illustration.php?id_illustration=431939&id_taxon=10332&mobile=0&SID=ura5or1i76o39oeb0tiitao4o2&language=English&thumbnails_selectable=0&selected_thumbnail=0&query_type=species&query_broad_or_restricted=broad&group=0&lay_out=0&uhd=1 illustration] [https://www.kroossoorten.nl/index_en.html photo of flowers].
Distribution
This species is widely distributed in cool-temperate regions, including Great Britain and Ireland,Clapham, A.R., Tutin, T.G. and Warburg, E.F. 1968. Excursion Flora of the British Isles. Cambridge University Press. {{ISBN|0 521 04656 4}}Hackney, P. (Ed.) 1992. Stewart & Corry's Flora of the North-east of Ireland. Institute of Irish Studies. The Queen's University of Belfast. {{ISBN|0 85389 446 9}}(HB) Asia (Bangladesh, China (Northern, Western, Southern [Yunnan]), Taiwan, India (Eastern, Northern), Indonesia (Sumatra, New Guinea), Brunei, Japan, Malaysia, Myanmar, Papua New Guinea, Pakistan, Philippines); Europe; Oceania; N. America; and S. America.Ito, Y., T. Ohi-Toma, Nb. Tanaka, Nr. Tanaka, and J. Murata (umpubl.) New or noteworthy plant collections from Myanmar (8) Blyxa aubertii var. echinosperma, Lemna trisulca, and Najas tenuis. APG: Acta Phytotaxonomica et Geobotanica xx: xxx-xxx.
References
{{Reflist}}
External links
- [http://www.efloras.org/florataxon.aspx?flora_id=1&taxon_id=200027351 Lemna trisulca] in Flora of North America
{{Taxonbar|from=Q158194}}
Category:Plants described in 1753
Category:Taxa named by Carl Linnaeus
Category:Flora of Northern America
{{Araceae-stub}}