Hydrilla verticillata 

Scope: Global
Language: English

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Hydrocharitales Hydrocharitaceae

Scientific Name: Hydrilla verticillata
Species Authority: (L.f.) Royle
Regional Assessments:
Common Name(s):
English Hydrilla, Indian Stargrass, Florida-elodea, Water-thyme

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2011
Date Assessed: 2010-04-14
Assessor(s): Zhuang, X.
Reviewer(s): Juffe Bignoli, D., Bounphanmy, S., Meng, M. & Homsombath, K.
This species is widespread and locally common and is considered as an invasive in many countries. Its global population needs to be studied to monitor trends. However, it is not considered to be in risk of extinction and is therefore listed as Least Concern.

Geographic Range [top]

Range Description:Widespread from the temperate and tropical regions of the Eastern Hemisphere. It is considered an noxious plant in the USA and has been introduced in many European countries. This aquatic plant is believed to be native to Africa, south and southeast Asia.
Countries occurrence:
Afghanistan; Bangladesh; Belarus; Bhutan; Burundi; Cambodia; China (Anhui, Fujian, Guangdong, Guangxi, Guizhou, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Shaanxi, Shandong, Sichuan, Tibet [or Xizang], Yunnan, Zhejiang); Congo, The Democratic Republic of the; Estonia; Hong Kong; India; Indonesia (Jawa, Maluku, Sulawesi, Sumatera); Iran, Islamic Republic of; Ireland; Japan (Nansei-shoto); Kazakhstan; Kenya; Korea, Republic of; Lao People's Democratic Republic; Lithuania; Malaysia (Peninsular Malaysia, Sabah, Sarawak); Myanmar; Nepal; Papua New Guinea; Philippines; Russian Federation (Altay, Amur, Irkutsk, Khabarovsk, Krasnoyarsk, Primoryi, West Siberia); Rwanda; Sri Lanka; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Uganda; United Kingdom; Viet Nam; Zambia
Austria; Germany; Hungary; Italy; Spain (Canary Is., Spain (mainland)); United States
Present - origin uncertain:
Latvia; Poland
Additional data:
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:No population information available although it is a common and widespread species.
Current Population Trend:Unknown
Additional data:
Population severely fragmented:No

Habitat and Ecology [top]

Habitat and Ecology:It is locally common in rivers and ponds. This species is hardy and tolerant to heavy metals. Many studies have investigated the ecological role of this species in polluted waters (i.e., Wang et al. 2007, Bao 2008, Huang et al. 2009).

Use and Trade [top]

Use and Trade: A dried powder from the plant has be used as detergent  in the treatment of abscesses, burns and wounds. It has been used as an ornamental plant.

Threats [top]

Major Threat(s): No specific widespread threats have been reported.

Conservation Actions [top]

Conservation Actions:

No conservation measures are in place. More research may be needed to determine population trends and global population.

Citation: Zhuang, X. 2011. Hydrilla verticillata. The IUCN Red List of Threatened Species 2011: e.T167871A6402883. . Downloaded on 25 April 2017.
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