OF THE CAROLINAS & GEORGIA

Spermatophytes (seed plants): Angiosperms (flowering plants): Monocots: Alismatales

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (11/30/12):
Hydrilla verticillata   FAMILY Hydrocharitaceae   Go to FSUS key


SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Hydrilla verticillata   FAMILY Hydrocharitaceae

 

COMMON NAME:
Hydrilla


         To see larger pictures, click or hover over the thumbnails.

image of Hydrilla verticillata, Hydrilla

Keith Bradley    kab_h_verticillata_74746

June    Miami-Dade County    FL

South Dade Wetlands

Stems and leaves near the surface look like bottle brushes, per Invasive Plants, Guide to Identification, Impacts and Control.


click here to see other plants that look similar to this COMPARE aquatic plants

image of Hydrilla verticillata, Hydrilla

JK Marlow    jkm160914_166

September        

SE-EPPC Aquatic Plant ID Workshop

Fresh leaves noticeably rough to the touch, per Weakley's Flora (2015).

image of Hydrilla verticillata, Hydrilla

JK Marlow    jkm160914_166b

September        

SE-EPPC Aquatic Plant ID Workshop

Leaves mostly 1-2cm long, with stout sharp teeth on margins and midrib beneath, per Weakley's Flora.

 

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (11/30/12):
Hydrilla verticillata   FAMILY Hydrocharitaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Hydrilla verticillata   FAMILY Hydrocharitaceae

 

Find by SCIENTIFIC NAME:

711

Submersed aquatic (rooted); Forb
Perennial
Dioecious (a monoecious form exists north of SC)

Non-native: Old World

Habitat: Ponds, lakes, rivers, often locally abundant, per Weakley's Flora

map
Click here to see a map, notes, and images from Weakley's Flora of the Southeastern US.

Click here to see a map showing all occurrences known to SERNEC, a consortium of southeastern herbaria. (Zoom in to see more detail.)


INVASIVE

This plant is causing problems in natural areas outside its native range, according to authorities such as:

 

IS THE PLANT "ARMED"?
Leaves have stout sharp teeth on margins and midrib beneath

LEAVES:
Simple
Whorls of 4-8
Margins toothed with stout sharp teeth

FLOWER:
Summer
Whitish sepals & translucent petals in female flowers, male reddish-brown
3 sepals in pistillate flowers
3 petals in pistillate flowers

Flowers solitary on elongate flexuous stalks

FRUIT:
Summer/Fall
Capsule

 

TO LEARN MORE about this plant, look it up in a good book!



 


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