OF THE CAROLINAS & GEORGIA

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

WEAKLEY'S FLORA OF THE SOUTHEASTERN US (4/24/22):
Hydrilla verticillata   FAMILY Hydrocharitaceae   Go to FSUS key



SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Hydrilla verticillata   FAMILY Hydrocharitaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)

Hydrilla verticillata

SYNONYMOUS WITH Flora of North America

Hydrilla verticillata

 

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 (Kaufman & Kaufman, 2007).


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 (4/24/22):
Hydrilla verticillata   FAMILY Hydrocharitaceae

SYNONYMOUS WITH PLANTS NATIONAL DATABASE:
Hydrilla verticillata   FAMILY Hydrocharitaceae

SYNONYMOUS WITH Floristic Synthesis of North America. BONAP (Kartesz, 2021)
Hydrilla verticillata

SYNONYMOUS WITH Flora of North America
Hydrilla verticillata

 

Find by SCIENTIFIC NAME:

711

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

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

Non-native: Old World

Common (rare in Mountains of GA & SC) (rare in GA Piedmont)

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


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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