Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Hydrocharitales Hydrocharitaceae

Scientific Name: Hydrocharis dubia
Species Authority: (Blume) Backer
Hydrocharis asiatica Miq.
Pontederia dubia Blume

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2013
Date Assessed: 2011-01-26
Assessor(s): Juffe Bignoli, D.
Reviewer(s): Zhuang, X., Homsombath, K., Meng, M., Bounphanmy, S., Nophasead, L. & Allen, D.
This aquatic plant has been recorded across a wide geographic range and no major threats to its global population have been reported. Its is therefore listed as Least Concern.

Geographic Range [top]

Range Description:

This aquatic plant has been recorded in several countries across southeast and east Asia, Indonesia and northern Australia. In China it has been recorded in the provinces of Anhui, Fujian, Guangdong, Guangxi, NE Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Shaanxi, Shandong, Sichuan, Taiwan, Yunnan, and Zhejiang. In Thailand it is found in the Chiang Mai (northern), Nakhon Ratchasima (eastern) and Ang Thong in Saraburi (central).

Countries occurrence:
Australia (New South Wales, Queensland); Bangladesh; China (Fujian, Guangdong, Guangxi, Hainan, Hebei, Heilongjiang, Henan, Hubei, Hunan, Jiangsu, Jiangxi, Jilin, Liaoning, Shaanxi, Shandong, Sichuan, Yunnan, Zhejiang); India; Indonesia (Jawa, Sulawesi); Japan; Korea, Republic of; Myanmar; Papua New Guinea (Papua New Guinea (main island group)); Philippines; Taiwan, Province of China; Thailand; Viet Nam
Upper elevation limit (metres): 1200
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: There is no information on global population trends but numerous populations have been reported.
Current Population Trend: Unknown
Additional data:
Population severely fragmented: No

Habitat and Ecology [top]

Habitat and Ecology: It grows in ponds, lakes and streams of lowlands.
Systems: Freshwater

Use and Trade [top]

Use and Trade: No information on this species.

Threats [top]

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

Conservation Actions [top]

Conservation Actions: No conservation measures in place.

Classifications [top]

5. Wetlands (inland) -> 5.1. Wetlands (inland) - Permanent Rivers/Streams/Creeks (includes waterfalls)
suitability: Suitable  major importance:Yes
5. Wetlands (inland) -> 5.5. Wetlands (inland) - Permanent Freshwater Lakes (over 8ha)
suitability: Suitable  major importance:Yes
5. Wetlands (inland) -> 5.7. Wetlands (inland) - Permanent Freshwater Marshes/Pools (under 8ha)
suitability: Suitable  major importance:Yes

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
In-Place Species Management
In-Place Education

Bibliography [top]

Ho, P.H. 1999. Cay Co Vietnam (An illustrated Flora of Vietnam). Nha Xuat Ban Tre, Vietnam.

IUCN. 2011. IUCN Red List of Threatened Species (ver. 2011.1). Available at: (Accessed: 16 June 2011).

Kress, W.J., DeFilipps, R.A., Farr, E. and Kyi, D.Y.Y. 2003. A Checklist of the Trees, Shrubs, Herbs, and Climbers of Myanmar. National Museum of Natural History, Smithsonian Institution, Washington DC.

Santisuk, T. and Larsen, K. (eds). 2001. Flora of Thailand - Volume 7 Part 3. Flora of Thailand, pp. 351-654. The Forest Herbarium, Royal Forest Department, Bangkok.

WCSPF. 2010. World Checklist of Selected Plant Families. Available at:

Wu, Z.Y., Raven, P.H. and Hong, D.Y. (eds). 2010. Flora of China. Science Press and Missouri Botanical Garden Press, Beijing and St. Louis.

Citation: Juffe Bignoli, D. 2013. Hydrocharis dubia. The IUCN Red List of Threatened Species 2013: e.T169011A6561474. . Downloaded on 14 October 2015.
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