Ottelia alismoides

{{Short description|Species of flowering plant}}

{{Speciesbox

| image = Ottelia alismoides - flower view.jpg

| image_caption =

| status = LC

| status_system = IUCN3.1

| status_ref = {{cite iucn |author=Zhuang, X. |author2=Beentje, H.J. |date=2017 |title=Ottelia alismoides |volume=2017 |page=e.T164482A83999434 |doi=10.2305/IUCN.UK.2017-1.RLTS.T164482A83999434.en |access-date=12 November 2021}}

| genus = Ottelia

| species = alismoides

| authority = (L.) Pers.

| synonyms =

• Damasonium alismoides (L.) R.Br.
• Stratiotes alismoides L.

}}

Ottelia alismoides, commonly known as duck lettuce,{{cite book |editor1-last=Lee |editor1-first=Sangtae |editor2-last=Chang |editor2-first=Kae Sun |title=English Names for Korean Native Plants |year=2015 |publisher=Korea National Arboretum |location=Pocheon |isbn=978-89-97450-98-5 |page=556 |url=http://www.forest.go.kr/kna/special/download/English_Names_for_Korean_Native_Plants.pdf |access-date=7 March 2019 |via=Korea Forest Service}} is a species of aquatic plant native to Asia and northern Australia. Due to habitat loss and deterioration, it is endangered in China and Japan,{{Cite journal |last1=Wagutu |first1=Godfrey Kinyori |last2=Tengwer |first2=Miriam Chepkwemoi |last3=Jiang |first3=Wei |last4=Li |first4=Wei |last5=Fukuoka |first5=Goo |last6=Wang |first6=Guangxi |last7=Chen |first7=Yuanyuan |date=2021-08-01 |title=Genetic diversity and population structure of Ottelia alismoides (Hydrocharitaceae), a vulnerable plant in agro-ecosystems of Japan |url=https://www.sciencedirect.com/science/article/pii/S2351989421002262 |journal=Global Ecology and Conservation |volume=28 |pages=e01676 |doi=10.1016/j.gecco.2021.e01676 |bibcode=2021GEcoC..2801676W |issn=2351-9894}} although it is an invasive weed in America.{{Cite web |title=USDA Plants Database |url=https://plants.usda.gov/home/plantProfile?symbol=OTAL |access-date=2025-06-17 |website=plants.usda.gov}} Its genome has also been sequenced, resulting in a 6.45 Gb assembly to help study its unusual carbon metabolism mechanisms and aid in genetic conservation.{{Cite journal |last1=Wang |first1=Zheng-Feng |last2=Wu |first2=Lin-Fang |last3=Chen |first3=Lei |last4=Zhu |first4=Wei-Guang |last5=Yu |first5=En-Ping |last6=Xu |first6=Feng-Xia |last7=Cao |first7=Hong-Lin |date=2024-05-23 |title=Genome assembly of Ottelia alismoides, a multiple-carbon utilisation aquatic plant |journal=BMC Genomic Data |volume=25 |issue=1 |pages=48 |doi=10.1186/s12863-024-01230-0 |doi-access=free |issn=2730-6844 |pmc=11118731 |pmid=38783174}}