|Scientific Name:||Hydrilla verticillata|
|Species Authority:||(L.f.) Royle|
|Red List Category & Criteria:||Least Concern ver 3.1|
|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.
|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.|
Native: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, West Siberia); Rwanda; Sri Lanka; Taiwan, Province of China; Tanzania, United Republic of; Thailand; Uganda; United Kingdom; Viet Nam; Zambia
Introduced:Austria; Germany; Hungary; Italy; Spain (Canary Is., Spain (mainland)); United States
Present - origin uncertain:Latvia; Poland
|Range Map:||Click here to open the map viewer and explore range.|
|Population:||No population information available although it is a common and widespread species.|
|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).|
|Major Threat(s):||No specific widespread threats have been reported.|
No conservation measures are in place. More research may be needed to determine population trends and global population.
|Citation:||Zhuang, X. 2011. Hydrilla verticillata. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 13 December 2013.|
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