Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Asterids: Lamiids: Lamiales
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Aquatic weeds can clog irrigation channels and cover lakes, threatening crops and wildlife. Read more -- Outlawed! Federal Noxious Weeds: The Aquatics.
To see larger pictures, click or hover over the thumbnails.
Julia Scher, Federal Noxious Weeds Disseminules, USDA APHIS ITP, Bugwood.org bug_5376505
Julia Scher, Federal Noxious Weeds Disseminules, USDA APHIS ITP, Bugwood.org bug_5376507
M. Grodowitz, Bugwood.org bug_5431111
Aerial leaf blades elliptic-lanceolate, glabrous, margin crenate to lobed, per Flora of China.
COMPARE aquatic plants
Emergent aquatic that also has submerged leaves (rooted); Forb
Non-native: Old World tropics
Habitat: Ponds, ditches, lakes, per Weakley's Flora
NEW! Click here to see a map from Weakley's Flora of the Southeastern US showing range and abundance.
Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)
This plant is causing problems in natural areas outside its native range, according to authorities such as:
- Georgia Exotic Pest Plant Council, 2006
- SC Department of Natural Resources Aquatic Nuisance Species List, 2003
- SC List of Regulated Pest Plant Species, 2017
- USDA Federal Noxious Weeds, 091820
Submerged leaves multiparted; aerial leaves simple
Aerial leaves whorled
Lavender to violet
2-lipped 4-5 lobed tubular or funnelform corolla
4 included stamens
Flowers solitary in leaf axils
TO LEARN MORE about this plant, look it up in a good book!