Spermatophytes (seed plants): Angiosperms (flowering plants): Eudicots: Core Eudicots: Saxifragales
WEAKLEY'S FLORA (11/30/12):
Myriophyllum spicatum
FAMILY
Haloragaceae
NEW! Click to go to FSUS key
Dig deeper at SERNEC, a consortium of southeastern herbaria.
Check out EDDMapS.org to see where this has been reported.
Learn more about Eurasian Water-milfoil from the Vascular Plants of North Carolina.
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Myriophyllum spicatum
FAMILY
Haloragaceae
COMMON NAME:
Eurasian Water-milfoil
To see larger pictures, click or hover over the thumbnails.
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USDA-NRCS PLANTS Database / Britton, N.L., and A. Brown. 1913 pnd_mysp2_001_lvd
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Leslie J. Mehrhoff, University of Connecticut, Bugwood.org bug_5273022
Month Unknown
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Steve Hurst, USDA NRCS PLANTS Database, Bugwood.org bug_5308029
Month Unknown
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Chris Evans, Illinois Wildlife Action Plan, Bugwood.org bug_5330057
Month Unknown
Stem diameter below inflorescence is up to 2x diameter of lower stem, per Weakley's Flora (2012).
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Graves Lovell, Alabama Dept. of Conservation & Natural Resources, Bugwood.org bug_5400611
Month Unknown
Leaves well-developed, pinnately divided with filiform segments, per Weakley's Flora (2012).
COMPARE
aquatic plants
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Leslie J. Mehrhoff, University of Connecticut, Bugwood.org bug_5447204
Month Unknown
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Leslie J. Mehrhoff, University of Connecticut, Bugwood.org bug_5447206
Month Unknown
Flowers/fruits in erect spikes emersed from water, per Weakley's Flora (2012).
WEAKLEY'S FLORA (11/30/12):
Myriophyllum spicatum
FAMILY
Haloragaceae
SYNONYMOUS WITH
PLANTS NATIONAL DATABASE:
Myriophyllum spicatum
FAMILY
Haloragaceae
965
Submersed aquatic w flowers & fruits above the surface (rooted); Forb
Perennial
Usually monoecious
Non-native: Eurasia
Habitat: Ponds and impoundments, 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:
- Alabama Invasive Plant Council, 2012
- Georgia Exotic Pest Plant Council, 2006
- SC Department of Natural Resources Aquatic Nuisance Species List, 2003
- SC List of Regulated Pest Plant Species, 2017
- Tennessee Exotic Pest Plant Council, 2009
- US Fish & Wildlife Service
- Virginia Department of Conservation and Recreation, 2014
LEAVES:
Leaves well-developed: pinnately divided with filiform segments
Submersed leaves whorled. Bracts of emersed shoots different than submersed lvs
FLOWER:
Spring/Summer/Fall
Reddish
Unisexual (rarely bisexual)
4 sepals
4 petals
8 stamens
Inferior ovary
Flowers in spikes
FRUIT:
Spring/Summer/Fall
Schizocarp of mericarps
TO LEARN MORE about this plant, look it up in a good book!
- Field Guide to Aquatic Plants of Alabama p45
- Invasive Plants, Guide to Identification, Impacts and Control p432
- Field Guide to the Rare Plants of Georgia p233